Toshiba 4TB 500GB SATAIII 4000go Serial ATA III; 4000 GB; 7200 RPM; Serial ATA III, Hard drive – 3.5 "Hard Drives (128 MB, Hard drive) : Amazon.co.uk: Computers & Accessories
Seagate Skyhawk ST4000VXZ16 4TB Internal Hard Drive HDD Video Recording up to 64 Cameras 3.5" 64MB Cache SATA 6Gb/s Silver FFP Includes 3 Year Rescue Service : Amazon.co.uk: Computers & Accessories
HP E 4TB 6G SATA 7.2K RPM LFF (3.5-INCH) SC MIDLINE 1YR Warranty Hard Drive 3.5" 4000 GB : Amazon.co.uk: Computers & Accessories
WD Red 4TB 3.5 Inch NAS Internal Hard Drive - 5400 RPM - WD40EFAX : Amazon.co.uk: Computers & Accessories
MaxDigitalData 4TB 64MB Cache 7200PM SATA 6.0Gb/s 3.5" Internal Surveillance CCTV DVR Hard Drive (MD4000GSA6472DVR) - w/ 2 Year Warranty : Amazon.co.uk: Computers & Accessories
Western Digital Blue WD40EZAZ 4TB SATA 6Gb/s 3.5" Hard Drive WD Blue,Solid State Hard Drive : Amazon.co.uk: Computers & Accessories
WD WD40EZRZ 3.5 Inch SATA 6Gb/s Desktop Hard Drive 4TB - Blue : Amazon.co.uk: Computers & Accessories
WD - 4TB Desktop SATA Hard Drive - OEM - Black : Amazon.co.uk: Computers & Accessories
Dogfish 4TB SSD M.2 2280 SATA III Internal Solid State Drive 3D-NAND 6Gb/s NGFF Internal Hard Drive for Desktop Laptop : Amazon.co.uk: Computers & Accessories
WD Black 4TB Performance Desktop Hard Disk Drive - 7200 RPM SATA 6 Gb/s 64MB Cache 3.5 Inch : Amazon.co.uk: Computers & Accessories