I just got a external harddrive from my brother for christmas
Its well worth it so far. Its very fast. Much more faster than i would expect a usb harddrive to be.
But i did put in the computer in the office and the computer had usb version 1.0. It was soo slow. Took 2 hours to copy 3 gigs. So if your going to get a external harddrive make sure your computer supports usb version 2.0. If you bought your computer in the last 3 years it should be fine.