WD  80 GB External USB 2.0 Hard Drive with Dual Option Backup Dual-option backup lets you choose how and when to back up your data, automatically or on-the-spot USB 2.0 interface provides a high-speed connection for maximum throughput WD's exclusive Safe Shutdown feature ensures all data has been safely transferred before shutting down the drive Fast, 7,200 rpm rotational speed Preformatted--simply plug it in and go