Western Digital HD WDXUB4000KDNN 400GB USB2.0 7200rpm 16MB Retail

Dual-option Backup choose how and when to back up your data, automatically or on-the-spot. Front-mounted power button equipped with WDs exclusive Safe Shutdown feature that ensures all data has been safely transferred before shutting down the drive,Preformatted simply plug it in and go,Designed for near-silent operation with WDs whisper-quiet hard drive,Fast, easy connection to PC or Macintosh computersCool, heat-dissipating case,Stands vertically or horizontally ,Stackable