Amazon.com: HGST Ultrastar 3TB 64MB Cache 7200RPM SATA III 6.0Gb/s 3.5in (Heaty-Duty, 24/7) Internal Hard Drive for CCTV DVR, NAS, PC/MAC (Renewed) : Electronics
Amazon.com: Western digital RE 3 TB Enterprise Hard Drive: 3.5 Inch, 7200 RPM, SATA III, 64 MB Cache - WD3000FYYZ (Old Model) Bullet - 5 years warranty from seller : Electronics
Amazon.com: WL 3TB 7200RPM 64MB Cache SATA 6.0Gb/s 3.5" Desktop Hard Drive (For Server, RAID, NAS, DVR, Desktop PC) w/1 Year Warranty : Electronics