HP E 4TB 6G SATA 7.2K RPM LFF (3.5-Inch) SC MIDLINE 1YR Warranty Hard Drive 3.5 Inch 4000 GB : Amazon.co.uk: Computers & Accessories
Toshiba 4TB Enterprise Internal Hard Drive – MG Series 3.5' SATA HDD Mainstream server and storage, 24/7 Reliable Operation, Hyperscale and cloud storage (MG08ACA16TE): Amazon.co.uk: Computers & Accessories
Sonnics 2TB 3.5" SATA Hard Drive 7200RPM Desktop PC/Surveillance Storage Hard Drive CCTV Camera CCTV System DVR (Renewed) : Amazon.co.uk: Computers & Accessories
Dell 529FG 4000go SAS Hard Drive – 3.5 "Hard Drives (4000 GB, 7200 rpm, SAS HDD) : Amazon.co.uk: Computers & Accessories
Toshiba 4TB S300 Surveillance HDD - 3.5' SATA Internal Hard Drive Supports up to 64 HD cameras at a 180TB/Year workload (HDWT720UZSVA) : Amazon.co.uk: Computers & Accessories