For all ever growing storage needs, check out the Toshiba HDTB120EK3CA from Currys which is on sale for a mere £89 including delivery. In comparison, a similar 2TB hard drive from WD costs £115.
This is a 2TB 2.5in external hard disk drive that is compatible with USB 3.0 and backward compatible with USB 2.0. At less than 45p per GB, it is around 50 per cent more expensive than an equivalent 3.5in drive but many will appreciate the fact that it doesn't require an external power supply and can instead be powered via a USB port.
The drive inside is likely to be one of Toshiba's own. It has a rotational speed of 5,400RPM, 32MB cache and doesn't require any drivers plus it is covered by a two year warranty.
Now there are a few things worth mentioning. Firstly, the design of the drive is not ground-breaking and is as conservative as it can get. It is light (180g) and small enough (119 x 79 x 16) to fit in your jeans' back pockets.
We don't know whether you can actually take apart and whether it uses a standard 9.5mm drive or one which is even thicker (the fact that it is 16mm thick leads us to believe in the latter).