Western Digital WDH1B5000 500 GB Hard Drive
 
Western Digital WDE1U5000 500GB Portable External Hard Disk Drive
 
Western Digital WD RE2-GP WD5000ABPS - Hard drive - 500 GB - internal - 3.5 - SATA-300 - 7200 rpm - buffer: 16 MB
 
Western Digital My Book 750GB Essential USB2.0 External Hard Drive