WD My Passport WDBPKJ0040BBK - hard drive - 4 TB - USB 3.2 Gen 1 - WDBPKJ0040BBK-WESN - External Hard Drives - CDW.com
WD My Book WDBBGB0040HBK - hard drive - 4 TB - USB 3.0 - WDBBGB0040HBK-NESN - External Hard Drives - CDW.com
![Amazon.com: Western Digital Red Pro 4TB 3.5-Inch 7200rpm 64MB Cache NAS Hard Drive (WD4002FFWX) : Electronics Amazon.com: Western Digital Red Pro 4TB 3.5-Inch 7200rpm 64MB Cache NAS Hard Drive (WD4002FFWX) : Electronics](https://m.media-amazon.com/images/I/51z-0u+2dTL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Western Digital Red Pro 4TB 3.5-Inch 7200rpm 64MB Cache NAS Hard Drive (WD4002FFWX) : Electronics
![Amazon.com: Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD42PURZ : Electronics Amazon.com: Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD42PURZ : Electronics](https://m.media-amazon.com/images/I/71KGby9PZkL.jpg)
Amazon.com: Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD42PURZ : Electronics
![WD Purple 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD40PURZ - Walmart.com WD Purple 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD40PURZ - Walmart.com](https://i5.walmartimages.com/seo/WD-Purple-4TB-Surveillance-Hard-Disk-Drive-5400-RPM-Class-SATA-6-Gb-s-64MB-Cache-3-5-Inch-WD40PURZ_0da0714f-2164-49d1-89cc-b4d257b23541_1.b83754fd720412e9c90b71864c70c57a.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)