In addition, the computer does not recognize the SD card because the card lock has been removed. Now you need to check the side of the memory card to see if there is a lever or not and what state the lock is in. Slide the lock upwards to unlock the memory card.
Besides, if the memory card you use to plug in the computer is a phone memory card, you need to reformat the memory card by inserting it back into the phone. After that, do not forget to delete hidden files so that the computer can read them. However, you should be aware that reformatting the memory card may cause some or all of the data recorded on the card to be lost.
In case you plug the memory card into the computer but the drive status in This PC shows 'No drive', now the problem is with your computer. Most likely your computer has too little virtual memory resulting in the computer not recognizing the SD card. The way to handle this problem is not too complicated, you just need to close all programs and try the memory card again. If the retry process still fails, you need to update the memory card reader driver again.
Reinstall the memory card reader driver for the computer
Step 1: First, left-click the My Computer icon (on Win7) or This PC (on Win 10), then select Device Manager Manager to start accessing the device manager bag.
Step 2: At the drive, right-click the USB, select Uninstall and press OK to delete.
Step 3: The last step, what to do is to unmount the SD card and restart your computer. Finally, insert the SD card into the slot for the computer to recognize and download the appropriate memory card reader driver.
If the computer still recognizes the memory card but cannot read the file, it is likely that the memory card has been infected with a virus or the card has been improperly removed many times. Did you know this phenomenon is because people often plug USB in public computer rooms such as schools, offices, photocopiers or Internet shops. but carefreely care about the possibility of the drive being infected by a virus when Plug the card reader back into your computer.
What to do now is not to panic or immediately reformat the USB drive. The reason is because reformatting the USB drive can cause all data to be lost or make data recovery difficult.
To perform data recovery, follow these instructions:
Step 1: Go to My Computer (Win 7) or This PC (Win 10)
Step 2: Find a USB drive or memory card to recover files hidden by viruses
Step 3: Click on 'Show Hidden Files' and wait. This process will take a few minutes to restore data.
Step 4: After all important data has been restored, you need to delete the shortcut created by the virus using the memory card as usual.
Thus understanding the correct cause of the computer not recognizing the SD card will help you handle this problem easier. Let's look at each possibility in turn to fix it yourself. In case you do not handle this problem yourself, take the computer to a computer service center to quickly fix it.