I'm tempted by this, its doesn't look very stylish but a host powered 640GB for £79 seems like a good deal to me. Saves you the hastle of plugging in the bigger 3.5'' drives
Seagate's Expansion 640 GB is entirely Plug & Play ready and therefore ideal for giving your computer's storage space a boost.
Simply connect it to your computer's USB port to begin transferring all your files, from digital photos and music to films and games.
Expansion / Connectivity Interfaces 1 x Hi-Speed USB
Miscellaneous Cables Included 1 x USB cable
Package Type Retail
General Device Type Hard drive - external
Width 8 cm
Depth 14.1 cm
Height 1.8 cm
Weight 160 g
Localisation Middle East, Africa, Europe
Hard Drive Form Factor 2.5"
Capacity 640 GB
Interface Type Hi-Speed USB
Performance Interface Transfer Rate 480 Mbps
Spindle Speed 5400 rpm
Manufacturer Warranty Service & Support Details 2 years warranty
Min Operating Temperature Limited warranty - 2 years
Power Software Included USB bus