If you obtain a message like that or similar to it then please do the following steps:
1. Use CHKDSK command lines in CMD
Step 1. Click Search > type command prompt.
Step 2. Right-click on Command Prompt and select "Run as Administrator".
Step 3. Enter the below command: chkdsk /f h: and then press Enter. (Replace h: with the drive letter of your unreadable disk or drive.)
If an error shows up asking for a restart like this:
Then type Y and click Enter