Western Digital 250GB Passport V2 External USB 2.0 Powered 2.5" Hard Drive £82.60 including free SuperSaver delivery at Amazon...
Pack up your office files and take them home. Carry thousands of songs or pictures. These drives are simple to use, light and easy to carry, and require no power adapter - they are powered directly through the USB cable.
Installation is a snap because you don't really "install" this drive; you just plug it in and it's ready to use. There is no CD to install; the included software loads from the drive the first time you plug it in. Powered by the USB bus, so no separate power supply needed.
This ultra-portable drive fits easily in your pocket or purse, weighs only a few ounces and holds tons of valuable data.