Western Digital 973910700615 WD Black 320 GB Mobile Hard Drive, 2.5 Inch, 7200 RPM, SATA II, 16 MB Cache (WD3200BEKT) (Old Model)
Toshiba 320GB MQ01ACF032 7200RPM 16MB SATA 2.5" Laptop HDD Hard Disk Drive | eBay
Western Digital (WD) Caviar Blue 320 GB (320gb) SATA II 7200 RPM 8 MB Cache Bulk/OEM Desktop Hard Drive for PC, Mac, CCTV DVR, NAS, RAID- 1 Year Warranty - Walmart.com