I am not sure how to explain my problem, so I have attached a pic here.

The drive MULTISTORAGE is inactive. It doesn't show up in MYCOMPUTER. I tried to reformat it, I get an error message "Volume is being used ... .. ."
I am not sure how to get this drive back. Problem is, I do not know if I have saved anything there or not. So, can't just blindly delete the partition and recreate it.
- What could cause this problem? I did not use any 3rd party app to create this drive
- How can I view files in this drive?