Thermaltake Max 4, 3.5" HDD USB external enclosure
 

We find and use external hard drives for backup. For us this gives us the added security that should anything go wrong with our computers we have a totally separate hard drive with our data backed up. And of course it is so easy to transfer data from one PC to another.

at: http://www.a1-electronics.net/PcHard...ax-4_Aug.shtml