I used an old Sony cdr/rw external (USB) as an enclosure for a 80 Gig HD. It worked fine for a while, and then one day when i tried to access it said: "this drive is not formated, do wish to format the drive now". It appears in my computer as g: (C:) drive just like it used to, and the mass storage device removal icon still appears in the tray. It just won't open the drive. I am not sure, but I may have unplugged it w/o disableing the drive, (by clicking on the removal icon), but I never had a problem before.
This in WIN XP pro. Anyone have any suggestions how to get the sytem to recognize this thing again?