HITACHI 3.5 Inch Internal Hard Drive SATA 6Gb/s 6TB 7200rpm Desktop PC CCTV HDD | eBay
Toshiba 6TB Enterprise SATA Hard Drive - 7200 RPM, 128MB Cache, 6 Gb/s Transfer Rate for Business and Personal Use : Amazon.co.uk: Computers & Accessories
Seagate Barracuda 3.5" 6TB SATA 6Gb/s internal hard drive ST6000DM003