WD  My Book Essential 2 TB USB 2.0 Desktop External Hard Drive Easy to set up, easy to use: Just plug it in and it's ready to use. There is no CD to install. Automatic backup: every time you save something it's automatically backed up. Fits right in: Takes no more space than a paperback book. Designed to save power by going into standby mode after 10 minutes of inactivity Interface: USB 2.0