Laptop recognize USB (makes sound), but won't load!!! HELP!!?

I've tried changing the drive letter, but that doesn't help. The usb appears in the storage management window but states no media. Also, the computer recognizes the flash drive in printer and devices. But from that window all i can do it dismount the flash-drive.

The problem started Friday afternoon. That morning I loaded a document. When I went to print it at Office max that afternoon, the file wasn't in the folder and the other documents appeared to be in a unreadable programs. When the employee tried another computer, the same thing. When I got home, the thing won't even load.