|Make & Model of external drive may help. I would try: |
- Test external drive on another PC, and maybe another OS other than Windows 7.
- Run chkdsk http://www.hard-drive-help.com/chkd... , or a manufacturers hard drive diagnostics utility, if available, to test the drive (ie. Western Digital - DataLifeguard utility, Seagate - Seatools utility, Fujitsu - FJDT etc).
Just another stupid saying...