How to Repair/Fix a Corrupted flash Drive without Formatting?

Posted by Molly to Data Recovery on June 29th, 2018

My USB flash drive keeps popping up a message, saying that it is unreadable and corrupted. I know formatting it may be useful however I don't wanna lose any data. So, how to fix the corrupted flash drive without formatting it?

Usually, various reasons may lead to a flash drive corruption, including catalog file damaged, internal file system errors, sudden power off, improper operation, force restart, virus or malware attacks, etc. No matter what the cause is, the corrupted flash drive will turn to be unreadable or unrecognizable by the operating system. Thus, you will have no access to the files stored on it.

In this article, we're going to share with you 3 different methods to fix a corrupted flash drive without formatting or losing any data.

How to fix a corrupted flash drive without formatting it?

Method 1: Use CMD commands to fix the corrupted flash drive without formatting

When a flash drive gets corrupted or damaged, it refuses to open. If you don't wanna lose data through formatting, the best way to fix a corrupted flash drive is using CMD command. Just keep in mind that you must type the command lines carefully to prevent any unexpected errors to the system.

Step 1: Plug in the corrupted flash drive to your computer.

Step 2: Type "cmd" in the search bar and press Enter on Windows 10. You can also press Windows key + R to launch the search bar and type in "cmd" on Windows 7/8.1.

Step 3: Type the following command - "chkdsk /X /f USB drive letter:" or "chkdsk USB drive letter: /f". Please replace USB drive letter with the drive letter of corrupted flash drive. Here the testing flash drive letter is G, so the input should be: "chkdsk /X /f G:" or "chkdsk G: /f ".

fix a corrupted flash drive with CMD

Step 4: If it prompts "Windows has made corrections to the file system. No further action is required.", it means the corrupted flash drive has been fixed without formatting.

fix a corrupted flash drive with CMD

Method 2: Fix a corrupted flash drive without formatting on PC

Windows PCs can fix the corrupted flash drive by itself, no formatting needed. Just follow the steps.

Step 1: Plug in the corrupted flash drive to your computer.

Step 2: Go to This PC (on Windows 10) > Removable Disk.

Step 3: Right click the corrupted flash drive and click Properties from the menu.

Step 4: Click on Tools tab and click Rebuild button. The scan process will begin.

Step 5: After scan process finished, close the window.

Step 6: Eject the flash drive and then re-plug in again.

Hopefully, the corrupted flash drive should be fixed successfully without formatting, and you'll have access to the data within it.

Method 3: Recover lost data from corrupted flash drive and then fix it

If the methods above failed, the only way to fix the corrupted flash drive is to reformat it. But before that, you can safely recover lost data with reliable flash drive data recovery software, like iBoysoft Data Recovery.

Besides fixing corrupted flash drive without formatting, iBoysoft Data Recovery is also able to recover lost data from RAW USB flash drives, recover lost data from formatted hard drives, recover lost data from corrupted SD cards, CF cards, memory cards, Pen drives, etc. on Windows 10/8.1/7.

How to recover lost data from corrupted flash drive before formatting with iBoysoft Data Recovery?

Step 1: Download and install iBoysoft Data Recovery on your computer.

Step 2: Launch iBoysoft Data Recovery and choose the corrupted flash drive. The program will start scanning the corrupted flash drive for lost files.

recover lost data from corrupted flash drive without formatting

Step 3: Preview and choose files you want to recover.

Step 4: Click "Recover". Please restore the recovered files to a different drive. Make sure you have all the expected data back.

After the recovery process finished, you can fix the corrupted flash drive by formatting. Then, you can re-use this flash drive and stored data on it.

Still have questions?