RRP: $229 Compare Western Digital WESTERN DIGITAL 4TB Purple 3.5" Surveillance Internal HDD SATA3 64MB Cache - 24x7 Always on. Up to 64 Cameras Per Drive. Tarnish Resistant Components. 3YR Warranty Designed for Personal - HO or SMB Introducing the WESTERN DIGITAL 4TB Purple 3.5" Surveillance Internal HDD, the perfect storage solution for your surveillance needs. With its impressive 4TB capacity, this hard drive allows you to... $229 $ $216 Add to Cart