yep thats the sort of thing, I have quite a few of them... once a upon a time it was much cheaper to get an enclosure and an internal disk and make your own external.. not the case really now. Still its a nice way of backing up stuff / checking disks. I actually normally just use a cable and power supply that goes to usb (forgetting the casing) to make periodic backups - like using harddrives as big floopy disks! :-)