Home Slickdeals WD Purple 4TB Surveillance Hard Disk Drive – 5400 RPM Class SATA... Slickdeals WD Purple 4TB Surveillance Hard Disk Drive – 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD40PURZ $100 By ARCOM - 5 June 2020 123 0 SHARE Facebook Twitter Go to the deal page: WD Purple 4TB Surveillance Hard Disk Drive – 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD40PURZ $100