4TB WD Purple WD40PURZ Surveillance CCTV DVR NVR & PC SATA III 3.5 HDD 5400RPM. The item "4TB HARD DRIVE WD Purple WD40PURZ CCTV DVR NVR & PC SATA III 3.5 HDD 5400RPM" is in sale since Friday, May 6, 2016. This item is in the category "Computers/Tablets & Networking\Drives, Storage & Blank Media\Hard Drives (HDD, SSD & NAS)\Internal Hard Disk Drives". The seller is "a2z-cctv-uk" and is located in London, London. This item can be shipped worldwide.