By Emily / Last Updated September 4, 2019

“Can a damaged SanDisk USB drive be fixed?”

“I have a problem with my 32GB SanDisk USB flash drive. It was accidentally removed before 'shutdown"; now it is kind of damaged and not recognized by my Windows computer. The data on it is insignificant, but, if possible, I'd like to keep it. I had another flash drive with the same symptoms and ended up junking it. Don't want to do that again!!! So is there a reliable SanDisk USB repair tool which can effectively fix such damaged USB drive? Thank you.”

Major causes and symptoms of damaged USB drive

Before you try to fix damaged USB drives, looking through major causes behind this issue can help mitigate future storage-related issues.

  • Unplug USB drive without selecting “safely remove hardware and eject media”.

  • The USB drive gets infected by virus or malware.

  • There are some bad sectors on the USB drive.

  • USB partition table or MBR is damaged.

  • Remove USB drive abruptly during data writing process.

When the SanDisk USB drive gets damaged or corrupted due to the above factors, there are chances that you will be bothered by the following symptoms.

You Need To Format Disk

  • SanDisk USB drive shows Write Protected error: when you receive error “Disk is write protected”, you will be unable to access, copy or move any data saved on the SanDisk USB drive.

The Disk Is Write Protected

  • SanDisk USB drive shows RAW file system: when the USB drives is in RAW file system, which is not a standard or recognizable file system for Windows operating system, you will lose accessibility to all personal data on SanDisk USB drives.

Besides the most common three symptoms, you might also receive error message: USB device not recognized. No matter which situation you are now stuck in, a SanDisk USB drive repair tool can save you a lot of work in making your corrupted USB flash drive workable again.

Powerful SanDisk USB repair tool

Among all the available USB repair utilities, AOMEI Partition Assistant Standard is worth your trying most. It is free and compatible with 32bit and 64bit of Windows 10/8/7/XP/Vista. It can not only repair SanDisk USB drive, but also fix other branded USB devices. It provides four methods to help repair damaged USB flash drive. Keep reading for more details.

Method 1. Check USB partition and fix found errors

To check errors on USB drive and fix them correspondingly, some users prefer to run CHKDSK commands (chkdsk g: /f /r /x) in Command Prompt window. If you are not good at such stuff or meet the error “CHKDSK is not available for RAW drives”, you can switch to AOMEI Partition Assistant Standard.

Step 1. Download the freeware, install and run it on Windows computer. Right click the USB drive and select “Advanced”> “Check Partition”.

Advanced Check Partition

Step 2. Here, you can choose the first method to both check and fix found errors on the selected partition. If it is a RAW drive, you can only choose the third method.

Check Partition And Fix Errors

Step 3. Then wait for the process to be finished.

Method 2. Check disk errors

Besides checking partition, AOMEI Partition Assistant can also help check an entire disk status to prevent potential disk failure.

Step 1. Right click the USB drive and select “Surface Test” from the drop-down list.

Surface Test

Step 2. Tick “Quick Check” and click “Start” to check whether there are any bad sectors on the disk.

Disk Surface Test

Method 3. Rebuild MBR

MBR is a boot sector and located at the very beginning of the computer’s hard disk. When it gets damaged, the USB drive probably won't be recognized suddenly. In such case, you can rebuild MBR via AOMEI Partition Assistant.

Step 1. Right click the USB drive and select “Rebuild MBR”.

Rebuild Data Disk MBR

Step 2. Choose a proper MBR type for your current operating system, and click “OK”.

Choose MBR Type

Step 3. Back to the main interface, click “Apply” to start rebuilding the MBR.


Method 4. Reformat the corrupted USB drive

If you don’t get satisfying result from the last three solutions, you might have to format the corrupted SanDisk USB drive. If Windows cannot format USB successfully since it is RAW or write-protected, you can switch to AOMEI Partition Assistant Standard as well. But formatting will erase data on the SanDisk USB drive, so please recover data from the damaged disk via data recovery software and move them to another safe location in advance.

Step 1. Right click the USB drive and choose “Format Partition”.

Format exFAT Partition

Step 2. In this window, select a proper file system according to your actual needs and click “OK”.

Format exFAT To FAT32

Step 3. Click “Apply” in the top left corner to execute the pending operation.

This formatting process will help you remove write protection from the USB drive if it is caused by corrupted file system. If the damaged USB drive is set into write protection mode by accident in Command Prompt window, then you need to remove read only attribute using command line.

Final Words

With this great SanDisk USB repair tool, you can easily repair damaged USB flash drive, pen drive or SD card in Windows 10/8/7. If you upgrade to AOMEI Partition Assistant Professional, you can tackle with many other tricky issues like SSD slowing down, c drive full and more.