Thanks for the help. I've been looking at the cheaper ones on ebay, but i dont understand how alot of them come with no power supply!
Can the USB really provide enough juice to power the hdd while exchanging data? I guess USB charges my phone when i connect that so maybe its the same?
http://www.ebay.co.uk/itm/USB-2-5-H...210?pt=LH_DefaultDomain_3&hash=item5d5469242a