6 Ways - Repair and Fix Corrupted/Inaccessible USB Flash Drive
How to Fix Corrupted USB Flash Drive without formatting it
Method 1: Try Different USB Ports
USB port can be one of the reasons that your USB flash drive does not work properly. So we recommend you try another USB port in the computer or you can connect the USB flash drive to other computer for checking. If it is still not work, please try the following ways.
Method 2: Assign USB Flash Drive Letter
You computer cannot assign a drive letter for USB flash drive due to unknown errors. Therefore, you can manually assign a drive letter for the flash drive to solve the problem.
How to Assign USB Flash Drive Letter
Step 1: Press Win + R to open the Run windows and type diskmgmt.msc
Step 2: Right-click your drive, select Change Drive Letter and Paths from the context menu.
Step 3: Click Add, select a drive letter in the drop-down menu and hit OK.
Step 4: See if you can open your drive and access your data.
How to Repair and Fix USB Flash Drive File Structure
Method 3: Repair USB Flash Drive for Windows 7/8/XP
Step 1: Insert the USB flash drive into the USB port of your PC.
Step 2: Go to My Computer>Removable Disk and open its Properties.
Step 3: Click on Tools, click "Rebuild" button.
: Click Start to begin the scan process. Wait and click close once the process complete.Step 5: Right-click the icon of the USB flash drive "Eject". Then remove the drive from the USB port.
Method 4: Repair USB Flash Drive for Windows 10
Step 1: Connect USB drive to PC.
Step 2: Go to My Computer>Removable Disk and open its Properties.
Step 3: Click on Tools, click the Check option and tick automatically fix file system errors and Scan for and attempt recovery of bad sectors. Click Start.
Step 4: Click Close once the process completed.
Step 5: Right-click the USB drive icon and select Eject to remove from the existing port.
Method 5: Recover Files on USB Flash Drive Using CMD
Step 1: Press Win + R to run Command Prompt.
Step 2: Type "chkdsk /X /f E:" or "chkdsk E: /f" in the Command Prompt, then press the Enter key. (E is the drive letter of your USB device)
Step 3: You can type the following command and press Enter to run it: attrib –h –r –s/s /d E: *.*
Step 4: After the process, you can find all the recovered files saved on your USB flash drive with a newly created folder. By default, the files will be in .chk format. You can change the file format and save it at another location.
Method 6: Recover Files on USB Flash Drive after Formatting
Some people may accidentally format it when the computer pops up the information Window that whether the USB drive is to be formatted or not. Don't worry. Even if you formatted the USB Flash Drive, you can still have chance to recover the data with USB Flash Drive Data Recovery software. However, it is important to note that once the USB flash drive is formatted, stop using the USB Flash Drive, do not add new data to the USB Flash Drive, and do not format the USB flash drive again.
How to Recover Data on Mac after USB Flash Drive Formatted
Please download and install this Mac USB Flash Drive Data Recovery Pro application on your Mac computer. Connect your formatted USB flash drive to Mac.
Step 1: Run the Mac Flash Drive Recovery Tool
Select the USB flash drive to start data recovery.
Step 2: Recover Files
Preview and recover lost files after scanning.