The FreeAgent Pro's large capacity, multiple connectivity options, fast performance and unique design aren't quite enough to justify its high price. If it came with a full version of Memos Autobackup backup software, then we'd rate it higher.

This drive is primarily aimed at Mac users, but it can be adapted to work on PCs. It's a capacious and fairly inconspicuous drive, but we do wish it was supplied with a full version of its backup software, instead of a trial, and that WD would include an eSATA cable.

It's quiet, it's energy efficient and it’s 2TB of space in an easily connectible box. The Western Digital My Book Studio Edition II may not be the fastest kid on the block, but it isn’t a slow coach and it is customisable enough to suit most situations.

The My Book World Edition II comes with an easy-to-use solution from MioNet that facilitates remote file access. It's a 1TB drive, so it can store a lot of stuff, but its cost isn't exorbitant.