Hello.
Today, one of the most popular types of media is a flash drive. And no matter what anyone says, the age of CD/DVD discs is coming to an end. Moreover, the price of one flash drive is only 3-4 times more than the price of a DVD! True, there is one small “but” - it is much more difficult to “break” a disk than a flash drive...
Although not often, one unpleasant situation sometimes happens with flash drives: you remove the microSD flash card from your phone or camera, insert it into your computer or laptop, but it doesn’t see it. There can be many reasons for this: viruses, software errors, failure of a flash drive, etc. In this article, I would like to stop on the most popular reasons for invisibility, as well as provide some tips and recommendations on what to do in such cases.
Types of flash cards. Is SD card supported by your card reader?
Here I would like to dwell in more detail. Many users often confuse one type of memory card with another. The fact is that there are three types of SD flash cards: microSD, miniSD, SD.
Why did the manufacturers do this?
There are simply different devices: for example, a small audio player (or a small mobile phone) and, for example, a camera or photo camera. Those. The devices are completely different in size with different requirements for the speed of flash cards and the amount of information. This is why there are several types of flash drives. Now in more detail about each of them.
1. microSD
Size: 11mm x 15mm.
MicroSD flash cards are very popular thanks to portable devices: players, phones, tablets. Using microSD, the memory of the listed devices can be increased very quickly by an order of magnitude!
Usually, when purchasing, they come with a small adapter so that this flash drive can be connected instead of an SD card (more on them below). By the way, for example, to connect this flash drive to a laptop, you need to: insert micsroSD into the adapter, and then insert the adapter into the SD slot on the front/side panel of the laptop.
2.miniSD
Size: 21.5mm x 20mm.
Once popular cards used in portable technology. Today they are used less and less, mainly due to the popularity of the microSD format.
3. SD
Size: 32mm x 24mm.
Flash cards: sdhc and sdxc.
These cards are mostly used in devices that require a large amount of memory + high speed. For example, a video camera, a car video recorder, a camera, etc. devices. SD cards are divided into several generations:
- SD 1 – from 8 MB to 2 GB in size;
- SD 1.1 – up to 4 GB;
- SDHC – up to 32 GB;
- SDXC – up to 2 TB.
Oh, very important points when working with SD cards!
1) In addition to the amount of memory, SD cards indicate the speed (more precisely, the class). For example, in the screenshots above, the card class is “10” - this means that the exchange speed with such a card is at least 10 MB/s (more details about classes: https://ru.wikipedia.org/wiki/Secure_Digital). It is important to pay attention to what speed class of flash card is required for your device!
2) microSD using special. adapters (they are usually written adapter (see screenshots above)) can be used instead of regular SD cards. True, doing this always and everywhere is not recommended (precisely because of the speed of information exchange).
3) SD card readers are backwards compatible: i.e. if you take a device that reads SDHC, it will read SD cards of 1 and 1.1 generations, but will not be able to read SDXC. This is why it is important to pay attention to what cards your device can read.
By the way, many “relatively old” laptops have built-in card readers that are not able to read new types of SDHC flash cards. The solution in this case is quite simple: buy a card reader that connects to a regular USB port; by the way, it looks more like a regular flash drive. Price: several hundred rubles.
SDXC card reader. Connects to a USB 3.0 port.
The same drive letter is the reason why flash drives, hard drives, and memory cards are invisible!
The fact is that if your hard drive has a drive letter of F: (for example) and your inserted flash card is also F:, then the flash card will not be displayed in Explorer. Those. you go to “my computer” - and you won’t see the flash drive there!
To fix this, you need to go to the “disk management” panel. How to do it?
In Windows 8: press Win+X, select “disk management”.
In Windows 7/8: press Win+R and enter the command “diskmgmt.msc”.
Next, you should see a window that will show all connected disks, flash drives, and other devices. Moreover, even those devices that are not formatted and that are not visible in “my computer” will be shown. If your memory card is on this list, then you need to do two things:
1. Change its drive letter to a unique one (to do this, simply right-click on the flash drive and select the operation to change the letter in the context menu, see screenshot below);
2. Format the flash card (if you have a new one, or it does not have the necessary data on it. Attention, the formatting operation will destroy all data on the flash card).
Changing the drive letter. Windows 8.
Lack of drivers is a popular reason why the computer does not see the SD card!
Even if your computer/laptop is brand new and you just brought it from the store yesterday, this does not guarantee anything. The fact is that the store sellers (or their specialists who prepare the goods for sale) could simply forget to install the necessary drivers, or simply be lazy. Most likely, you were given disks (or copied to your hard drive) with all the drivers and you just need to install them.
In general, there are special programs that can scan your computer (or rather, all its devices) and find the latest drivers for each device. I have already written about such utilities in previous posts. Here I will give only 2 links:
- Programs for updating drivers: ;
- Finding and updating drivers:
Connecting an SD card via USB using some device
If the computer does not see the SD card itself, then why can’t you try to insert the SD card into some device (for example, a phone, camera, camera, etc.) and connect it to the PC? To be honest, I rarely remove the flash card from devices, preferring to copy photos and videos from them, connecting them to my laptop via a USB cable.
Do I need special programs to connect my phone to a PC?
New operating systems such as Windows 7, 8 are capable of working with many devices without installing additional software. Installation of drivers and configuration of the device occurs automatically when the device is first connected to the USB port.
For each brand of phone/camera there are utilities recommended by the manufacturer (see on the manufacturer’s website)…
1. Try connecting the card to another computer and check if it recognizes and sees it;
2. Scan your computer for viruses (). Rarely, there are some types of viruses that block access to disks (including flash drives).
That's all for today, good luck everyone!
Microcontroller devices use external memory to store large amounts of data. If you need to store units of megabytes, then serial flash memory chips are suitable. However, for large volumes (tens to hundreds of megabytes), some kind of memory card is usually used. At the moment, SD and microSD cards are the most widespread, and I would like to talk about them in a series of materials. In this article we will talk about connecting SD cards to a microcontroller, and in the following we will figure out how to read or write data to them.
Pinout of SD and microSD cards
SD cards can operate in two modes - SD and SPI. The purpose of the card pins and the connection diagram depend on the mode used. 8-bit AVR microcontrollers do not have hardware support for SD mode, so cards with them are usually used in SPI mode. 32-bit microcontrollers based on the ARM core, for example AT91SAM3, have an interface for working with cards in SD mode, so you can use any operating mode there.
Assigning SD card contacts in SD mode
Assignment of SD card contacts in SPI mode
Assignment of microSD card contacts in SD mode
Assignment of microSD card contacts in SPI mode
Connecting SD and microSD cards to the microcontroller in SPI mode
The supply voltage of SD cards is 2.7 - 3.3 V. If the microcontroller used is powered by the same voltage, then the SD can be connected to the microcontroller directly. The racially correct diagram, compiled by studying the specifications on SD cards and the schematics of various development boards, is shown in the figure below. Cards on development boards from Olimex and Atmel are connected according to this scheme.
The diagram shows the pins of the SD card, not the connector.
L1 - ferrite or choke, rated for current >100 mA. Some install it, some do without it. But what you really shouldn’t neglect is the polar capacitor C2. Because when the card is connected, a current surge occurs, the supply voltage “drops” and the microcontroller can be reset.
There is some ambiguity about pull-up resistors. Since SD cards are made by several manufacturers, there are several specifications for them. Some documents clearly indicate the need for pull-up resistors (even for unused lines - 8, 9), while other documents do not contain these instructions (or I did not find them).
A simplified version of the circuit (without pull-up resistors) is shown in the figure below. This circuit has been tested in practice and is used in Microelectronika boards. It is also used in many amateur projects that can be found on the Internet.
Here the signal lines of the SD card are held high by the microcontroller and the unused lines (8, 9) are not connected anywhere. In theory, they should be pulled up inside the SD card. Further I will build on this scheme.
If the microcontroller is powered by a voltage different from the supply voltage of the SD card, for example 5 V, then the logical levels need to be coordinated. The diagram below shows an example of matching the levels of the card and microcontroller using voltage dividers. The principle of level matching is simple - you need to get 3.0 - 3.2 V from 5 volts.
The MISO - DO line does not contain a voltage divider, since the data on it is transferred from the SD card to the microcontroller, but to protect against fools, you can add a similar voltage divider there too, this will not affect the functioning of the circuit.
If you use a buffer chip, such as the CD4050 or 74AHC125, to match the levels, these disadvantages can be avoided. Below is a circuit where level matching is done using the 4050 IC. This IC has 6 non-inverting buffers. Unused chip buffers are "muffled".
Connecting microSD cards is similar, only their pin numbering is slightly different. I will give only one diagram.
In the diagrams, I looked at connecting SD cards to the microcontroller directly - without connectors. In practice, of course, you cannot do without them. There are several types of connectors and they differ slightly from each other. As a rule, the connector pins repeat the SD card pins and also contain several additional ones - two pins for detecting a card in the slot and two pins for determining write blocking. These pins are not electrically connected to the SD card in any way and do not need to be connected. However, if they are needed, they can be connected like a regular tact button - one pin to ground, the other through a resistor to the power positive. Or use a microcontroller pull-up resistor instead of an external resistor.
Connecting SD and microSD cards to the microcontroller in SD mode
Well, to complete the picture, I’ll give a diagram for connecting an SD card in its native mode. It allows data exchange at a higher speed than SPI mode. However, not all microcontrollers have a hardware interface for working with the card in SD mode. For example, Atmel's ARM microcontrollers SAM3/SAM4 have it.
The DAT data bus can be used in 1-bit or 4-bit modes.
To be continued...
What to do if the phone does not see the memory card? Since I often get asked this and similar questions, I answered them all at once in this article. It will be useful to owners of cameras, Samsung, Lenovo phones, laptops - in general, all those devices that support a memory card and refuse to read the data on the card.
First, some technical details describing the problem. Let's say, as a result of some manipulations, a mobile device (phone, tablet, smartphone) stopped identifying a memory card (SD card) even through a card reader. All data is written to the internal memory of the phone, bypassing the memory card itself. This is inconvenient because the SD card is not used, while the memory of the mobile device quickly fills up. Productivity decreases accordingly.
So, the problem is described in detail, let’s move on to diagnosing the phone, smartphone, tablet. Let's look at the most common reasons why phones don't see a memory card (flash drive) and how to fix this defect on your own using a card reader.
The phone does not see the SD card due to an incorrect file system format or a damaged file table
Cause of the problem. 1) The file table on the SD card was damaged and the markings were lost. 2) You formatted the memory card yourself, as a result of which the phone stopped seeing the flash drive. 3) SD card file system is unknown (used in another operating system)
How to fix. 1. Find out the size of your flash drive. If the microSD capacity is greater than 32 GB, it is most likely formatted in exFAT. Not all versions of Android support this file system.
2. A quick way to fix the problem is to reboot the phone in recovery mode and select the Wipe cache partition option in the Android service menu. This command will clear the contents of the SD card and format the media in the FAT32 file system - it is best suited for storing files on the phone.
Note. We would not advise inexperienced users to perform this procedure: if you mistakenly format the wrong partition, you will lose all the data on the phone, including files in the internal memory.
3. A safer (and more convenient) method of formatting an SD card is through a computer. You will need a card reader and SD Formatter software. It will help you format the flash drive properly.
4. You can try low-level formatting - however, not all manufacturers offer their own software for this (check the memory card website).
The memory card of the phone (tablet) has failed
Cause of the problem. As a result of mechanical / thermal damage incompatible with life, the phone stopped seeing the memory card or the SD card stopped working. Alternatively, the phone has stopped detecting the flash drive; on other devices the card is also unreadable.
What to do. Alas, nothing can be done with a damaged SD card. All you have to do is purchase a new SD card that is compatible in size and specifications with your smartphone or tablet. The most unpleasant moment is that all data that was stored on the memory card of an Android or iOS phone is completely lost. You will no longer be able to restore them - neither by connecting your phone with a flash drive via USB, nor through a card reader.
If the flash drive is still under warranty and looks like new (no visible damage), try returning it to the store. If you're lucky, you'll get a brand new replacement card.
Check for bad blocks (bad sectors) via HDDScan
The utility (ignore the name) allows you to check memory cards, flash drives for bad sectors and read errors.
To diagnose the problem, it is enough to run the SD card through two types of tests - Read and Write tests. After spending 5 minutes of time, you will get a conclusion: are there bad sectors that prevent correct operation, which is why the phone does not read the flash drive.
- If the flash drive was purchased recently, we replace it under warranty (local or global).
- If there is no guarantee or it has expired, we erase the bad sectors with zeros. This can be done through the program. This procedure will allow you to shift non-working sectors, as a result of which the flash drive will be correctly detected both on the computer and on the devices where it was actively used.
Formatting with modern digital cameras
A number of Canon and Nikon camera models, according to user reviews, give positive results - they format at a low level.
How to fix an SD card through a camera:
- Insert the SD card into the device,
- In the camera menu, find the format command,
- Try recording files onto a formatted card.
Contact technical support (for Transcend flash drives, etc.)
Their technical support specialists can advise free of charge methods for restoring problematic flash drives. In fact, who, if not them, is best versed in the design of SD cards? In addition, technical support may offer you proprietary programs designed for low-level formatting (sometimes they are difficult to find on the manufacturer’s website).
Give the memory card to specialists for recovery
This option is suitable if you are willing to pay for the work of specialists. This procedure is expensive, but the advantage is obvious: data can be extracted from a faulty device (though only if the memory chips were not damaged).
The memory card is not compatible with the mobile device
Cause. 1) The mobile device does not support new memory cards. 2) The memory card is too large or uses an unknown technical specification. Therefore, the phone refuses to read the data and does not recognize the flash drive as a storage device.
What to do. Carefully study the documentation for your phone and buy an SD card that does not conflict with the system requirements.
Wrong data transfer mode in Android
Symptom. You connect your phone with a flash drive via a USB cable, selecting the Mass Storage option, as a result it does not appear on the computer.
How to fix. Instead of "Mass Storage", when connecting your phone to a PC, select the "MEDIA TRANSFER" option. Explorer should display the contents of the memory card.
The contact of the USB flash drive has come loose or the tracks in the socket have been erased
Symptom. As a result of displacement or incorrect connection, the memory card does not connect to the mobile device, and, as a result, the phone does not see its contents.
How to fix. Remove the SD card from the phone, insert it back so that the contacts of the SD card are correctly connected to the socket.
If the contacts of an sd flash drive are completely worn out, you can buy them for a couple of dollars and replace them yourself (of course, if you have the appropriate skills/minimum experience in repairing and replacing spare parts).
It is possible that the contacts (that is, the tracks on the board) on the phone have been erased, and for natural reasons it does not see the flash drive at all. A common reason is natural wear and tear of the phone. In this case, we recommend sending the device for repair or replacing the mobile device.
Software error, as a result of which the phone stopped seeing the memory card
Description of the problem. A certain Android program refuses to recognize the memory card. Other applications read the SD memory card and write data to the flash drive as if nothing had happened.
Solution. Android does not see the memory card, because the application settings indicate the internal memory of the smartphone/tablet as the storage source. Go to the settings of the application with which you are experiencing problems (for example, Android Gallery or camera) and specify the SD card as a successor - that is, the location where the files should be saved.
Instructions on how to check an SD card for errors (video):
Answers to readers' questions
After updating the phone (HTC desire 620 g dual sim) microsd is not detected, the flash card is constantly lost. It happens like this: for example, I’m listening to music, and then it stops playing and the phone writes: “the file could not be opened.” At the same time, the track names can be read. What could be the reason?
Answer . Check the audio file format. The player may not be able to read files of the selected format. So the problem is not necessarily a memory card reading problem. If the file format is correct, check the memory card for errors and format it.
I inserted an SD drive into my phone (Samsung galaxy j3 2016), transferred all the photos and videos to a flash drive, and all photos and videos were deleted in the phone gallery. The files are on SD, but all new photos are saved to the device’s memory. I need it to be saved to a memory card and displayed in the gallery.
Answer. If your phone does not see the SD card, try changing the path to the successor in the application settings. It would also be a good idea to check whether your phone and the Android system recognize the memory card itself. Just in case, turn off your mobile device, take out the SD card and put it back. Turn on the device and check if the files are saved to the Samsung phone flash drive.
1. The phone does not see the SD memory card (flash drive). An SMS arrived, I opened it, and suddenly I stopped seeing it. I rebooted and still can't see it. The laptop sees, the other phone sees. And most importantly, the phone sees another memory card. Smartphone brand – Lenovo 650. Please help! Thank you in advance!!
2. Does not read the memory card. I have a Windows Phone Dual Sim 535. For a while my memory card was read, but later the phone stopped reading it. If you move it into other devices, it is readable, but not in mine, but if you insert other memory cards into my phone, then everything is fine. Why doesn't my phone see the memory card on my mobile device?
3. I cleared the phone's memory (fly), after which it stopped reading the SD card. The computer reads it, but the SD card is not detected on the phone. And it doesn’t see a single flash drive, I tried another card. (I probably deleted something unnecessary). Tell me how to correct the situation and why the phone does not read the memory card.
4. Prestigio phone. The phone stopped seeing the memory card. I was just sitting playing on the phone. Then I put it down for about 15-20 minutes. And when I took it, I received a notification “It is safe to remove the SD card.” I went into the settings - memory, where the External storage is. And there, instead of lines about how much memory there is, and how much the memory card on the phone takes up, there were only two lines.
- Connect SD card
- Clear SD card
I tried to press the first one and when I pressed it, the notification “Connecting an SD card.” And below this heading: “Checking errors” appeared for a second at the top (where the notifications are). And then a second later it was replaced by: “It’s safe to remove the SD card.” I tried rebooting, turning it off and on, removing and inserting the SD card. Same thing on another device. Why doesn't it see the flash drive?
5. Mobile devices do not see (do not read) the memory card. The memory card is new, recently purchased. At first there were no problems, but later the phone (philips s308) periodically did not read the map. The laptop saw it without problems. Soon the phone did not read the card at all, followed by other devices. The card does not contradict the system requirements. What could be the reason?What to do with it?
6. I have a tabletDIGMA OptimaI stopped seeing the flash drive after I cleared it in the settingsSDcard, restart, turned it on, took it out and inserted the flash drive back, nothing helped, I inserted it into another phone, I noticed it, but it doesn’t recognize it. What should I do?
Answer. If the phone no longer detects the memory card, you need to check this SD card on the computer via a card reader (the device connects to the PC via a USB cable and is inexpensive). In your case, the laptop has a built-in card reader. In order for a phone or tablet to read a card or USB flash drive, you need to correctly format it using WIndows or using special software. software We strongly recommend using the free SD Formatter program to format flash drives; this is a method we have tested and often works. We hope that after formatting, your phone will see the flash memory and will be able to write files to it as before. If the card reader still does not see the memory card, all that remains is to buy a new SD card.
I have a smartphoneSamsung Galaxy Gio S-5660. About six months ago I repaired the charging socket and haven’t turned it on since then until yesterday. It still contained a SIM card and a memory card. When I turned it on, it turned out that the smartphone did not see the memory card. Before this there were no problems with it. On the memory card there are contacts, books, a bunch of photos. Why doesn’t the tablet see the flash drive and how can I revive it?
I took the device in for repair and thought that the memory card slot was not working. It turned out that it works: he immediately sees the new card.
Answer . OnSDthe card may have damaged pins or contacts (pins). If you do not notice any damage upon inspection, check the memory card for reading errors. Do not format it under any circumstances, otherwise you will not be able to recover the files.
I cleared “Phone memory-memory card” on the iPhone on Android, after which the SD card turned off. Below it says “Connect SD card”, I press it – but there is no effect. Now there is no memory (I took the phone apart, but there is no slot for a flash drive). In general, the mobile phone does not see the memory card. Tell me how to return the SD card back to a working state?
Answer. If a working memory card is not visible on the device, the file table most likely contains errors. Try formatting the card using the sdformatter application. Since you are dealing with Android, the SD memory card must be formatted as Ext or Fat32.
Using the above application, I recovered photos on a Samsung SM-G 318H/DS. They remain in this application, I can’t transfer them to the gallery or to the SD card, how can I do this? Why doesn't it see the memory card?
Answer. Your question is formulated in a very florid way, so it’s difficult to say why the phone doesn’t detect the memory card. It looks like the problem is not with your phone's flash drive, but with something else. You need to copy the files to the DCIM folder on your device, then they will appear in the Gallery again.
I moved the SIM card from the tablet back to the smartphone and all the memory from the phone disappeared. What to do and whether it is possible to recover photos and contacts if the smartphone does not see the flash drive.
Answer. In your case, it's probably not so bad. You may have moved the SD card (flash drive), as a result of which it moved away from the smartphone socket. Check the connection between the slot and the phone's memory card. If contacts are missing on your smartphone’s flash drive, try importing contacts from the SIM card through the standard Android address book or synchronize contacts with your Google account.
Samsung Galaxy A5 2016 phone. Inserted a 2 GB Qumo SD card (new card, just purchased) into the second slot (for the second SIM card and SD card). The phone does not see it, either simply through the phone menu, or through a cable connection to a PC. What could be the reason, is there any way to “reanimate” the memory card?
Answer. Qumo memory cards don't have a very good reputation. However, usually 2 GB cards do not have problems when connected to a phone.
To begin, connect the memory card to the computer via a card reader. If the computer does not see the memory card (the disk is not displayed in Explorer), give the card (explaining that the computer does not see the SD card) to the seller and return the money.
If the SD card is not readable only on the phone, but everything is OK on the computer, try formatting the memory card by selecting FAT as the file system.
The Samsung Galaxy S5 smartphone has stopped seeing USB flash drives (previously it saw and read), the smartphone is practically new. Other devices, flash drives are detected without problems. Why doesn’t Android see the flash drive, how to fix the error?
Answer. There may be at least two reasons why the phone does not see the flash drive. Try to fix it like this:
1. Check if debugging is enabled on your phone (try enabling/disabling).
2. It is advisable to format the flash drive in exFAT, otherwise Android may not read its contents.
I dropped my phone and all the photos in the gallery in the camera folder disappeared from the memory card. Is it possible to somehow restore them? The remaining folders remained in their places.
Answer. Perhaps, or Android does not see the SD card. Check if the SD card works if you connect it via a card reader to a PC. Another reason why the phone does not see the SD card is that the card has physically moved in the slot when dropped, so at the same time check the connection of the contacts.
As for the direct answer to the question: if the memory card is intact, you can restore the photo using any application, starting with CardRecovery and Recuva.
The problem is doubly unpleasant, because the phone was purchased a month ago. I decided to transfer some audio-video files from my old phone. The new smartphone is j7, and the old one is also Samsung Galaxy Grand Neo... The data transfer took place without any emergency situations.
About a week later I looked at the sd, and the card did not appear from my native “my files”. I looked through the RAR program, through the xplore file explorer. All the folders were displayed there, but they turned out to be empty. But it’s important to add this: the phone’s memory also contained music and some video. So, they were displayed, but they were not “empty”, but refused to be reproduced - “reproduction error”. This never happened on an old phone with any sd and different ages, it certainly happened, but not this. And this recorded card can be read normally on the old phone, no problems.
For me, the main thing is, as you understand, the question is the phone, is that the reason? Such refusals to read in a month happened twice with internal memory, and four times with sidishna. Reboot - and everything is fine. But is this not at all the norm for a phone?
Answer. There may be several reasons for this behavior.
Perhaps the cause of the error lies in your method of copying files from internal memory to external memory. Try different methods and test: for example, through a card reader on a PC, through a file manager on a phone, etc. Do the described reading errors occur in all cases?
However, since you noted that there are no problems with other flash drives, then perhaps the problem is with the memory card. Who is the manufacturer, is the SD card compatible with your phone model? Read user reviews.
Third, update the software on your phone and remove unnecessary applications.
Fourth - format the SD card using the SD Formatter utility. Try different file system formats.
1. Last chance to find an answer to my problem. The Samsung galaxy not 5 (china) phone uses only its internal memory, and the flash drive is not detected. What I didn’t do... I checked the boxes, and inserted it into another mobile phone, formatted it, and this and that - it doesn’t help.
2. On the phoneSamsung Galaxy A3 memory card does not workmicrosdvolume 16 GB. For almost six months it was on the phone; all photos from the camera were automatically saved on it. The memory card has not been removed since it was placed in the slot once. I've been using the phone for almost a year. Previously there was another card with a capacity of 8 GB.
R.SI moved the card to another phone - he doesn’t see it either. And the computer doesn't recognize it either. What to do? On the flash drive are all the children's photos and videos taken over six months.
Answer. If your smartphone or tablet does not see the flash drive, the problem may be with an application that does not save files where needed. Check in the settings where the files are saved - on an SD card, flash drive or in the internal memory of your tablet/smartphone. For example, in the Android Gallery settings you can change the storage location for photos.
Re-read the article. If all else fails, then perhaps the phone does not see the microSD memory card because it is faulty.
The phone does not detect the memory card. I transferred everything to internal memory. When the card is disconnected, all files are read, but when connected, they are not. Now, when you disconnect the SD card, the internal memory is also disabled and there is nowhere to save information. Tell me what can be done if the memory card is not readable (if possible).
Answer. Did the memory card work before this time? The phone may not support this card model.
If the SD card worked before, you may need to format your card - and it will be writable again.
The question is formulated incorrectly: you write that when the memory card is disconnected, the files are read, while below you say that the internal memory is disabled. So where are the files read from then?
1. The phone worked with a memory card. With the congratulatory video they sent a virus that could not be removed. You delete it and it appears again. I tried to reflash the phone, but it didn't work. It didn't detect any updates. After some manipulations in the recovery menu, it became different, detected updates, downloaded and installed them. It shows its own firmware, but with a more recent date.
After this, the SD card is not detected. Android does not see it and does not detect its memory. And other sd too. Without a card, the phone sees its memory and works fine. What to do if the phone does not see the SD card after a virus?
2. I put an SD card in the computer - everything reads well there, you can see. And the phone displays the message: SECURE REMOVE CARD. Why doesn't my phone see the memory card? What to do?
Answer. If the phone does not see the memory card, this may be due to damage to the file table on it. How this is related to recovery is unclear. Try formatting the SD card. If nothing changes for the better, change the firmware.
1. I bought a 4G micro flash drive for my phone, installed it in my computer via a card reader, copied the files and installed it in my phone (Microsoft Lumia 530). After some time, I installed it again in the card reader and connected it to the computer. Windows issued a message that the device is faulty and does not read the flash drive, but everything works fine through the phone. And this happens with all USB media and devices. I checked flash on many computers before installing it on the phone - everything was OK. After installation, the memory card does not work on the computer - only through the phone.
2. I ordered a flash drive forebay(universal flash drivei- flash device). I received it yesterday, inserted it into my phone - it works, it also works on the computer. Today I tried to transfer a video from my phone to a flash drive, copying started, I left the phone and went away. Upon returning, I discovered that the program was closed, and the flash drive was no longer detected on the phone, nor was the computer detecting it. What to do?
3. I bought a 32 GB flash drive for my phone from AliExpress. It worked fine, then the photos that were saved to it were half cropped or there was a gray screen instead. Eventually it stopped being detected by the phone. The computer seems to detect it, but does not tear it off. It says something like "insert disk". I tried a lot of things that were written on the Internet, a lot of programs. Some don’t see the flash drive, some see it, but still can’t format it.Tell me how to bring her to her senses.
Answer. Format the flash drive using your phone or Recovery (we wrote about this at the beginning of the publication. If this does not help, go to Windows Disk Management and check whether the flash drive is mounted when connected to the PC, whether the volume is displayed in the list. If necessary, you can create a new partition on the flash drive and format in FAT or extFAT using specialized programs.
I turn on music on my phone, it says: no music files. Nokia RM-1035 phone and mirex micro sd (HC) class 4, everything worked yesterday. Probably the memory card is not readable! How to find out if it is working or not?
Answer. Check whether other mobile applications can see the contents of the memory card; to do this, you can install another player. Connect the microSD card to your computer or laptop via a card reader. If the flash drive is not accessible in both cases, try other methods described in the article.
The Samsung Galaxy A3 2015 phone does not read the flash drive. I formatted it in all possible formats, but it didn’t help. Connected it to a PC - everything works great. Why doesn't my phone see the flash drive? Maybe something needs to be changed in the phone settings?
Answer. Go to Settings - Memory. Check the "SD memory card" section. Install a file manager and see if the memory card files are displayed on it.
In addition to standard formatting, you can try low-level formatting - however, not all manufacturers offer their own software for this (check the memory card website).
Another reason why the phone does not see the SD card may be the lack of contact between the memory card and the phone. Check if your device reads other flash drives. If not, take the phone to be repaired.
Phone Doogee x5. The phone didn’t see the memory card, but it was there. Data was transferred to external memory by accident. For some reason the transfer was completed, but the card was still invisible. Pictures, videos, music have safely disappeared somewhere. How to get them back and why doesn’t the phone see the memory card? Is it possible to restore all this somehow? I tried Android Recovery - to no avail.
Answer. If the phone does not see the SD card, then how did you transfer the files to it? Perhaps you simply copied them to another location.
Try connecting the memory card via a card reader to your computer and scanning it with CardRecovery. As for Android Data Recovery, this program is less functional.
After disconnecting the SD card for work in aparted and carrying out manipulations in it, the prestigio phone does not turn on the SD card again. By the way, the laptop does not see the memory card either. Actions in recovery did not help. What to do if the phone does not see the memory card?
Answer. Perhaps the operating system and laptop see the SD card, but the markings have disappeared. You need to create a volume on unallocated space. Start – Run – diskmgmt.msc. Find the unallocated area and use the context menu to create a new volume on the SD card, assign a letter, apply formatting. After these manipulations, the SD card disk should be detected as before.
I connected the camera as in the instructions (via a USB port), but the camera reads it as a Portable device, but it needs a Removable disk. The camera does not see the memory card in connected mode or what is the problem? How can I change the display? Camera Nikon Coolpix S9400.
Answer. Your camera supports SD, SDHC and SDXC memory cards. The computer does not see the memory card as a drive. You need to remove the card from the camera and connect it to your PC via a card reader. If you have a card reader built into your laptop, connecting the card will be even easier. After that, you will see the removable drive in the list.
mico sd 32G in an Android tablet. I distort the connector - everything is ok, but after a while the conductor does not see it and through the setup menu, the SD card memory does not turn on. If you take out and insert a memory card, it appears. I cleaned the contacts, wiped them with rectification, but still Android does not see the SD card where the dog is buried?
Answer. Try testing another SD card with your phone. If the situation repeats and the smartphone does not see the flash drive (the memory card disappears from time to time), then most likely the problem is in the phone contacts.
If another memory card works without errors, we recommend formatting the problematic card in FAT32 or exFAT - in case the phone does not see the micro SD flash drive due to errors in the file table.
The phone (Samsung Galaxy S5) does not read the memory card. I inserted three cards, and none of them are read, although they are displayed correctly on other devices. In this case, the inscription “Connect SD card”, the font of which was previously gray, becomes white and clickable, but if you click, nothing happens. All photos and pictures in the gallery (located in the phone memory) are not displayed. And applications that are not in the internal memory, but in the phone memory, do not open. Tell me what to do?
Answer. There may be a failure at the level of the Android operating system or installed applications. Try to manually resolve the conflict by deleting all unnecessary applications from your phone. Update the OS version to the latest through the Android settings.
If the phone still doesn’t see the memory card, check the phone’s contacts: are there any visually noticeable damages on them?
Do you write "on other devices" when you mean a computer? If yes, it is likely that the file system of the flash drive is NTFS, and you need to format it to FAT or exFat.
When I insert an SD card into the phone, the device does not recognize it. No matter what I tried: even inserted it into other phones, I still can’t see or read its contents.
Answer. There is too little information about the memory card (virtually none) to give specific advice. First, check whether your phone supports SD cards of the size that is on your card (see the documentation for your smartphone or tablet). If you just bought a memory card, you can exchange it under warranty for another one of smaller capacity.
If you have previously used this memory card and it is no longer detected on this and other mobile devices, it is most likely faulty.
1. I cleaned the card on the computer. I deleted everything from it. Now there is a new smartphone teXet X-plus TM-5577. I inserted the Sidi card, he sees it, but nothing swings on the Sidi card and I can’t transfer anything to it. Tell me what to do?
2. The phone started to turn on on its own periodically (Lenovo A 526). Then I left the house and plugged in my headphones and noticed that not a single track was playing. Later, when I took out the phone, I discovered that the flash drive was not readable and the saved music did not play. I tried to reboot the phone - it doesn’t help, I put it in the card reader - it sees the memory card, I put it in a friend’s phone - too. But I don’t want it at all. And the most important thing that drives me crazy is the notification after turning on the phone with the phrase “Remove the MicroSD before deleting it so as not to lose data.
Answer. You need to connect the memory card to the computer again (as you did before), format the sd card in the standard way (for example, through Explorer) or using sdformatter. File system - FAT32. Most likely, it is due to incorrect formatting that the phone cannot write data to the memory card.
After a sudden shutdown, the tablet (Android 5.1) stopped normally recognizing memory cards in the card reader. It either writes, checking errors, or reads, which lasts indefinitely. At the same time, half of the programs stop responding, everything slows down wildly, and it becomes impossible to turn off the tablet (only when the discharge reaches 0 and turns it off). Sometimes (very rarely) after connecting, he sees it, but at the slightest manipulation with the card (even viewing a photo), he immediately loses it and begins to re-read it again, and this is the end. Tested on 3 flash drives, both clean and not, with different formatting and a lot of dancing with tambourines (all according to recommendations on the forums). A system rollback was performed. Nothing helped. He refuses to see the 8 gig card at all, although if you connect it via an adapter to the USB connector, everything works great (like other flash drives). What is the problem, in the card reader or in the system?
Answer. It is best to connect the problematic memory card to a laptop or, alternatively, via a USB adapter, as you mentioned. Next, the SD card needs to be formatted.
Most likely the issue is with the card reader. After a short time, many cheap card readers stop reading memory cards correctly and produce copying errors or read information slowly.
The system (Android) is unlikely to have anything to do with the problem, since you have already tested several memory cards. Perhaps it is a specific application that is slowing down the system, but this can only be determined by resetting the phone to factory settings.
Lenovo vibe shot phone, android 6. There is a 32gb sony sd card in the option as an extension of the main memory (ext4). The phone stopped seeing the file system - it says SdCard0 01/01/1970, 00 kb. Windows 7 sees two partitions - 16MB and 30GB, operational, 100% free each.
How can I return everything to its place by restoring the previous files? or at least how to pull out photos and the WhatsApp folder?
Answer. To recover a deleted partition on an SD card, R.saver or AOMEI Partition Assistant Standard Edition programs are suitable. If the file table on the partitions contains errors, you can try to fix them using the chkdsk utility for Windows. If that doesn't help, try scanning the SD card (unreadable sections) with the Recuva utility. Until you overwrite the information on the flash drive or format it, the chances of getting your files back remain high.
Samsung A3 2017 Samsung memory card 64 GB. I created folders from my computer: photos, ring notes, music, videos, movies, etc. The phone sees only audio, pictures, documents, video. Doesn't see any other folders on the memory card. What needs to be done?
Answer. Install any file manager for your phone (for example, Total Commander or ES Explorer). Create folders directly through these programs and copy everything you need there. Files should be read on the memory card without problems. It is also possible that those folders that cannot be read from the SD card are hidden or damaged. So it would be a good idea to format the card to avoid further errors.
Lenovo A2010 phone does not see the SD memory card. I tried to reboot, it says "Only one SD card is available, it is impossible to switch." Other phones do not have a card. It doesn’t show on the computer through the card reader at all. Is this really the end, so many photos and videos have disappeared? Maybe something can be done?
Answer. It looks like there are reading errors on the card or the markings have come off. Since the memory card does not open on the computer (i.e. the letter/separate drive is not displayed in the file manager), it makes sense to check whether the memory card is recognized as a device at all. To do this, go to diskmgmt.msc (Start - Run) and see if unallocated space appears when you connect the SD card to the PC. If it appears, create a new file volume in this space through the context menu. If nothing happens, most likely the SD card has failed.
Phone model sony xperia m4 aqua dual. For two years, the phone had a microSD memory card installed. Recently, glitches began to occur: at first, in order for the memory card to work, it was enough to restart the phone. Now the phone has stopped seeing the map completely. Failed to format. Installed a new one. The phone recognizes it (it’s in the settings, photos were sent to the card), but applications cannot be downloaded from the play store (it still shows the option to download only to the phone’s memory). What needs to be done in this situation with a flash drive?
Answer. Format the memory card with specialized applications - the same SDFortatter is quite suitable. Next, check the card for errors using the chkdsk tool.
However, you clarified that changing the memory card does not help. The problem may be caused by specific applications or software conflicts within the Android OS. In this case, we recommend updating the firmware or, as a last resort, resetting the phone (perform a hard reset).
After encrypting the SD card, Samsung A5 2017 stopped seeing it. Through the card reader on the computer it sees, but does not open. I tried to format (SDFormatter, cmd) - it doesn’t work. Sees other flash drives. I checked for errors - it gives an error, but does not correct it.
Answer. To check the SD card, use the following parameters:
chkdsk (drive letter): /f/r
- /f - fix file system reading errors
- /r - fix bad sectors on the sd card
This should fix errors and allow you to format the SD card in the standard way or through utilities like SDFormatter.
I have a Kingston DTSE3 16G USB drive, the computer doesn’t see it, the flash drive is unreadable. periodically the system displays a message stating that the device can work faster or. Are there any recovery programs?
Answer. The flash drive supports USB 2.0 interface. Your computer (motherboard) may have an older version of the ports, which is why this message appears. Therefore, we advise you to update your PC hardware if you have not done so for a long time.
Recovery programs will not help you, but formatting the flash drive correctly (in NTFS/FAT) and then checking for errors using chkdsk will not hurt.
The Samsung galaxy tab 4 SM-T331 tablet does not see the SD card. available places 0b, free 0b. and I inserted the same SD card into another device, into my phone, and sees the SD card: available 14.57 free 14.57. I insert another SD card into the tablet - again it doesn’t see it, but the phone sees it.
Answer. If there are important files on the memory card, make a copy of them on your computer. After that, format the memory card and check it for errors. If everything is in order, you can use the SD card on your tablet or phone and write files to it. If the situation repeats, update the tablet firmware or perform a hard reset. However, this is already an extreme measure; we advise you to first deal with reading errors.
I made the memory card an internal storage device forZTE blade A510. After resetting the phone (SDthe card was in the phone all this time) it stopped working on all devices, Android does not save to it.
Answer . You need to format and mount againmicroSDas an internal storage. If the memory card is opened on a computer, transfer all the data on it to your hard drive.
I have a Samsung Galaxy S4 NEO.I bought a 16 gig memory card, but after 5 months of use it suddenly stopped seeing all the games that were on it. And the phone sees videos, photos and everything else without any problems. In settings > memory > memory card, the total volume, free space is written - in general, everything is as usual. Help with this problem!
Answer . The easiest way is to reinstall the games. This can be done through the applicationGoogle Play. If user data is still stored in the phone memory or onSD-map, games will work as before.If not, try restoring them through the appropriate recovery applications.
SD cards will remain a popular data storage format for a long time. The standard has become very firmly entrenched in the photo and video equipment market, and therefore there was, is and will continue to be a need for card readers. From time to time, users encounter problems with the operation of SD cards (or card readers) in computers running Windows 10. The card is inserted into the appropriate port, but the computer cannot recognize it and the SD card is not displayed in Explorer. This is a very common and quite annoying problem, which, fortunately, is very easy to fix in the vast majority of cases. In this article you will find some tips that will help you if your computer does not see your memory card.
Although in this manual we are mainly talking about SD cards (the larger ones), the instructions are also relevant for microSD cards. Modern computers (Surface tablets, for example) have recently been often equipped with microSD slots. The tips described in the article are also relevant for these devices.
The computer or laptop does not see the memory card - what to do
First, you need to make sure that the card works. To do this, insert it into another device with a slot for SD (or microSD using an adapter) cards. This could be a camera, video camera, second computer, tablet, smartphone or any other device equipped with an appropriate slot. If the memory card is not recognized in this device or works intermittently, it means it is either damaged or needs to clean the connectors.
Take a cotton pad, ear swab or piece of cotton, lightly soak them in alcohol or an appropriate cleaning product (in theory, plain water will do, but either a special cleaner or simple alcohol will do the job best), then lightly go over the metal contacts on the back side of the memory card. Important: do not pour liquid on the card (this will only risk killing it) or insert it wet into the port. Make sure the contacts are dry and clean, and then try connecting the memory card to the computer again.
Check if this area of the memory card or adapter you are using is dirty.
If after this procedure the memory card works in other devices, but does not work in the computer, then it makes sense to also clean the slot itself. There may be too much dust in it, which prevents the computer from reading information normally. You can clean the memory card slot in a computer or laptop using compressed air.
Advice: Don't blow into the slot. Your mouth will not be able to provide enough air and pressure to effectively clean the slot of dirt. This cleaning method can do more harm than good, since you risk simply spitting on a slot in your computer. It's better to buy compressed air at your local computer store. Fortunately, it is not expensive, and at the same time, high pressure and a long nozzle will allow you to effectively clean the deep memory card port without the risk of spitting on it with your drool.
One more tip: Make sure you insert the card the right way. The computer should indicate which side the card should be inserted. Some slots use a snap mechanism to secure the card in the slot. In such a computer, you will not be able to install the card the wrong way around, since it will not lock. Other computers may not have this mechanism, so make sure the memory card is installed correctly. Do not use force when inserting or removing a card, as you risk breaking the slot, card, or locking mechanisms.
Let's say the memory card works, you insert it the correct way, the slot in your computer is clean, but the PC still does not see the SD card. In this case, there are a few more tips that should help.
Check if the memory card is recognized in the disk management interface. If the memory card is not assigned a letter, the drive will not appear in Explorer, although both the slot and the memory card physically work.
Check if the memory card slot is enabled in your computer's BIOS settings. Sometimes it happens that the card reader on the PC motherboard is simply disabled for some unknown reason. You can check this by simply diving into the BIOS settings. Restart your computer and during startup press F2/Delete (or another button selected by your manufacturer) to get into the BIOS. Each computer has its own BIOS (UEFI), which differs depending on the manufacturer or model of motherboard, so we cannot publish all options here. You need to find the section with ports and devices ( Onboard Devices / Miscellaneous Devices and so on), and then look for something like “ Media Card Reader”, “SD Reader”, “Enable ExpressCard" and so on. Make sure it is turned on, then save the settings, restart your computer and try connecting the memory card again.
A checkbox that is responsible for activating the built-in SD card slot in the BIOS of Dell computers. If there is no checkbox, the port will not work.
In the case of desktop computers, it is also possible to have a scenario where the SD card slot on the front of the case is not connected to the computer's motherboard. Here you will have to open your case (before doing this, completely disconnect the computer's power from the outlet) and see if the wire from the front panel of the case is connected to the motherboard. The wire with a 9-pin connector must be connected to the appropriate comb on the motherboard.
Sometimes the source of the problem can be an adapter that is not working as expected. This is the case if you are using an SD adapter for microSD cards or a card of another format paired with an adapter. Of course, you don’t always have an extra adapter at hand, but this option is also worth considering if you just can’t get your computer to work with a memory card. Fortunately, adapters cost mere pennies and finding them is not difficult.
You can refer to the system's built-in diagnostic and troubleshooting methods. Perhaps Windows itself will be able to find the cause and successfully eliminate it.
The next option is to turn the card reader off and on. Perhaps a banal bug in the operating system or controller led to the failure of the card reader.
If rebooting the adapter does not help, you can try to reinstall or update the card reader driver. Go to your manufacturer's website and check if there is a new driver version. If available, download and install it. You can first remove the old version of the driver in Device Manager.
It is worth understanding that none of these methods will help if your computer's slot is damaged or broken. If the memory card works in other devices, but is not detected in any way in your computer even after all these dances with a tambourine, then you need to contact a specialist who will check the physical condition of the port, repair or replace it. To extract information from a card, insert it into another device (the same camera), and then connect it via a USB cable to your computer, or transfer the data you need from another PC.
We hope these tips will help you fix the problem and you won’t have to go to a service center, repair your computer, or change the memory card.
Today we will talk about automatically installing applications on a memory card for tablets running Android. Devices from Apple, due to the lack of a MicroSD slot, are immediately eliminated - they are limited by the amount of built-in memory, so they have to store some of the data on the cloud. Whereas in most Android tablets this slot is present. Let's say more, recently gadgets have begun to support memory cards with a capacity of up to two terabytes! And no, we didn’t mistype it - it’s really true.
If the method below does not work for you, then try the one we wrote quite recently.
Why are applications not saved to the memory card?
We hasten to disappoint you - in some devices it will not be possible to allow automatic installation to MicroSD using software. In particular, this applies to devices running Android 4.4.2 and higher – right down to the “marshmallow”. Fortunately, there is third-party software that allows you to do this. But let’s not rush things – we’ll find out about everything in order.Find out the Android version
Well, now let’s put everything into pieces. First, we need to find out the Android version.
Go to the menu;
- Go to “Settings”;
- Scroll to the very bottom and click on the “About phone” item;
- In the submenu that opens, look for information on the version;
In this case it is Android 5.1.1. This method is suitable for both smartphones and tablets. As a matter of fact, on this device, without “external” intervention, it will not be possible to ensure that all applications are automatically installed on the card. But, as you have already noticed, we have third-party firmware with built-in Root rights.
With their help, you can easily install additional software, which, working in the background, will “scatter” all the files from programs and games across a flash drive.
Saving applications to a memory card for Android 2.2 – 4.2.2
Everything here is extremely simple and banal:
1. We still go to the menu and look for “Settings” there - the icon, as a rule, resembles a gear in appearance - there should be no problems finding it;
2. Next, look for the “Memory” sub-item. In our case, it is located between “Screen” and “Battery”. The menu may differ depending on the device manufacturer. The screenshot shows an example of a clean version of Android, without shells that are preinstalled at the manufacturing plants;
3. And now the most important thing - tap once on the “SD card” item, located below the inscription: “Default recording disk”. On the contrary, a circle or a tick should appear;
4. Profit! Now all applications downloaded through the Play Market will be automatically installed on external memory.
By the way, if the flash drive is slow, and there are such things, then applications may not work correctly. So buy a good SD card - don't skimp.
What to do with devices running Android KitKat and higher?
Unfortunately, you won’t be able to do this without obtaining Root rights. Google has officially stopped supporting this feature in new versions of the operating system. The fact is that cloud services are becoming more widespread and, as a result, problems with insufficient memory should not arise. But in our country there is no such high-speed Internet as in the USA, and traffic is not cheap, so clouds are not in demand.Is there any way to make sure that applications are automatically installed on the memory card? As we said above, this is real.
If you have a tablet from one of the Chinese companies, then it probably already has built-in Root rights, but you will have to tinker with other manufacturers. Naturally, in the course of this article we cannot talk about obtaining them, because the process for each gadget is unique - the instructions can only fit into a multi-volume book. But oh well, it doesn't matter.
You can contact a specialist with a request to install Root rights or do it yourself at home. The last option is the most risky; there is a chance to turn your gadget into a so-called “brick” and only be able to restore it in one of the service centers. However, if you have already carried out a similar procedure, there should be no problems. As a last resort, on the Internet you can also find solutions to these same problems. So, go ahead and experiment!
- Somehow we have strayed quite far from the main topic of the article. So, let's return to the instructions: Using any of the possible methods (flashing, unlocking the bootloader, etc.) we get Root rights;
- Go to Google Play;
- In the search bar we write: “SDFix: KitKat Writable MicroSD” - this is the assistant application that will be useful to us in the future. Let's install it. We hope this doesn't need to be explained to anyone? Just tap once on the “Install” button and the process will take place automatically, after which a shortcut to launch will appear in the menu;
- We open it and see a bunch of, most likely incomprehensible, inscriptions in English. There is no need to translate them - everything is resolved in a few clicks;
- Click on “Continue”, as shown in the first screenshot;
- We tick our agreement that by clicking the “Continue” button, the device will be slightly modified;
- We wait literally a couple of minutes until the orange screen changes to green.
- On the green screen we are informed that automatic installation of applications on the SD card has been successfully enabled.
