Right-click and select Run as Administrator . (This is crucial for the command to have permission to "lock" the drive for repairs). Step 3: Enter the CHKDSK Command
If your external hard drive (USB, SSD, or HDD) is acting up—showing corruption errors, refusing to open, or running painfully slow— is your first line of defense. This built-in Windows tool scans for file system errors and bad sectors, then fixes them.
Note the specific letter assigned to your external drive (e.g., E: , F: , or G: ). Step 2: Open Command Prompt as Administrator Press the on your keyboard. Type cmd into the search bar. Right-click on Command Prompt from the search results. chkdsk on external drive fix
: If prompted to "force a dismount" because the volume is in use, type Y and press Enter to allow the scan to start immediately. Option 2: Using File Explorer (GUI) A simpler way that doesn't require typing commands. How do I use chkdsk on external drives? : r/WindowsHelp
: Do not format the drive yet, as formatting erases the file index. You must use specialized data recovery software to extract files from the RAW partition first, or attempt to rebuild the partition table using tools like TestDisk. Once your data is safe, format the drive to NTFS or exFAT using Disk Management. 3. Alternative Ways to Repair an External Drive Right-click and select Run as Administrator
Run CHKDSK if you experience any of these:
This tool can read SMART data, remap bad sectors, and perform deep scans that CHKDSK cannot. This built-in Windows tool scans for file system
A: Rarely. CHKDSK may move corrupted files into a FOUND.000 folder with .chk extensions. Those can be recovered with file identification tools. Permanent deletion only happens if you tell CHKDSK to delete security descriptors ( /sdcleanup – do not use this).
How to recover data from a corrupted hard drive on Windows 11