This message typically means that Windows may have detected some file corruption on the PRIVATE volume of the drive and wishes to scan the drive as a precaution.

Perform a CHKDSK on the PRIVATE volume. If the data on the drive is accessible, we suggest backing up your data before proceeding.


  1. Your Defender Drive will need to be unlocked first.
  2. Open My Computer, and remember the drive letter for the "PRIVATE" volume. If you are not sure which one this is, look for the Application volume, and the PRIVATE volume is likely to be the next drive letter in sequence (it may also be labeled as "Removable Disk").
  3. Click on the Windows Start Menu.
  4. Click on "Run..." (keyboard shortcut: WINDOWS BUTTON + R).
  5. Type in "CMD" and press enter on your keyboard.
  6. From the command prompt window, type in CHKDSK and then the PRIVATE drive letter (not the Application volume), and then /f/r/x.
    For example, if the PRIVATE drive letter is G, you would enter:
         CHKDSK G: /f/r/x



If a message appears stating file are in use on the volume and it needs to force a dismount, type 'y' and press 'enter' on your keyboard to continue.

This will perform a "check disk" on the PRIVATE volume, and look for any corruption problems. Be sure to repair if prompted.