Amazon.com: Western Digital WD AV-GP 500GB 32MB Cache SATA 3.0Gb/s 3.5inch (CCTV DVR, PC) Internal Hard Drive (Low power, Quiet) -w/1 Year Warranty : Electronics
Amazon.com: WD Blue 320 GB Desktop Hard Drive: 3.5 Inch, 7200 RPM, PATA, 8 MB Cache - WD3200AAJB : Electronics