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8 May 2019  Amanda J. Brook  Senior Product Manager
 

Summary
Micro SD card is the smallest, nonvolatile memory in SD cards. It is mainly used in phones to save pictures, texts and videos. How if the micro SD card cannot be detected? We will tell you how to solve this problem in this article.



Micro SD card, used to be Trans-flash Card, was renamed as micro SD card in 2004, developed and introduced by SanDisk. The card is mainly applied in mobile phones. Some GPS devices, portable music players and flash memory disks are also equipped with such cards because of the tiny size and increasing storage capacity.
how to fix a corrupted micro sd card

Part 1. How if Micro SD Card cannot be Detected in Phones/Other Devices？

① Not correctly insert micro SD card

If the micro SD card is incorrectly plugged in, it cannot be detected. Please refer to the guide book or the SD card attachment beforehand, and then try to adjust the location and restart your phone.

② Get virus infection

Generally, the virus-infected or malware-attacked SD card cannot be detected. You can connect the micro SD card to the computer with a card reader, and then scan it with anti-virus software.

③ Get encrypted

If the micro SD card has ever been encrypted, it cannot be detected by the other devices. You should decrypt the card on the original device. After that, try again.

④ Get corrupted

It is very easy to check whether the micro SD card gets corrupted or not. You can insert it into the other phones/devices. If the card cannot be detected, it may have been corrupted. How to fix a corrupted micro SD card? Using the command CHKDSK or formatting it !

how to fix a corrupted micro sd card used in phones
Ahead of the fixing steps, you should back up the data in the micro SD card. Use Renee Undeleter as soon as possible in case of much data loss.
Renee Undeleter-Powerful Data Recovery Software

Easy to useOnly simple steps.

Multiple scan modesFast partition scan, whole partition scan and whole disk scan.

Supported file typesPictures, videos, audios, documents, mails, etc

Image creationCreate a drive image for quick access to the partition and backup.

Supported systemsWindows 10, 8.1, 8, 7, Vista, XP, 2000 and Mac OS X10.6, 10.7, 10.8.

Easy to useOnly simple steps.

Multiple scan modesFast partition scan, whole partition scan and whole disk scan.

Supported file typesPictures, videos, audios, documents, mails, etc

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Steps

① Download and install Renee Undeleter.

② Use the card reader to connect the SD card to the computer. Then launch Renee Undeleter and select [Whole Partition Scan].

Note: This mode can recover the files when the partition is incessible or formatted.

select whole partition scan in renee undeleter
③ Select the target SD card.
select the target drive to scan in renee undeleter
④ Wait for the scan. The scanning time depends on the capacity of the SD card.
scan and preview files to recover
⑤ Preview the scanned results. Check the target files and click [Recover].
preview and select the files to recover in renee undeleter
⑥ Select the target folder to save the files. As soon as you click [Recover], the files will come back!
select the output folder for usb or sd card recovery session in renee undeleter
Now the data has been retrieved, we can go to fix the micro SD card.

Part 2. How to Fix a Corrupted Micro SD Card?

The command CHKDSK and formatting are simple and common for most users. The steps are shown below.

1. Use CHKDSK to Fix Micro SD Card

CHKDSK is a free Command Prompt command in Windows, used to check and fix the micro SD card and the other disks. It doesn’t support all file systems of SD cards, only FAT and NTFS. If the micro SD card is not one of these systems, but HFS or EXT (used in Linux), you have to format the card.
① Insert the SD card into the card reader. Then connect it to computer.

② Press [Win + S] to search [cmd]. Right-click at Command Prompt to select [Run as administrator].

press Win+S key
enable command prompt
③ Type [chkdsk n:/f]. Replace “n” with the target drive letter of the partition, and /f is the order telling the command to fix any errors. This process takes some time, depending on how many contents need to be fixed.
type chkdsk to fix the corrupted sd card
Finally, insert the micro SD card into the phones/devices to check whether it works well. If not, you have to format it.

2. Format Micro SD Card

① Connect the micro SD card to the computer with a card reader.

② Open [This PC] and find the drive letter for your micro SD card. Then right-click to select [Format].

sd card formatted in this pc
③ Now the formatting screen will appear. Check [Quick Format] and click [Start]>[OK] to format the SD card.
check quick format