![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
![2TB Western Digital WD Blue 3.5-inch SATA III Desktop Hard Drive (5400rpm, 64MB cache) - Walmart.com 2TB Western Digital WD Blue 3.5-inch SATA III Desktop Hard Drive (5400rpm, 64MB cache) - Walmart.com](https://i5.walmartimages.com/seo/2TB-Western-Digital-WD-Blue-3-5-inch-SATA-III-Desktop-Hard-Drive-5400rpm-64MB-cache_671b7fe1-95a8-4bac-8418-ab0580dc3f5f_1.2db7c5f12468a3372017db325115c3d4.jpeg)
2TB Western Digital WD Blue 3.5-inch SATA III Desktop Hard Drive (5400rpm, 64MB cache) - Walmart.com
![Amazon.com: WD Green 1 TB Desktop Hard Drive: 3.5 Inch, SATA III, 64 MB Cache - WD10EARX : Electronics Amazon.com: WD Green 1 TB Desktop Hard Drive: 3.5 Inch, SATA III, 64 MB Cache - WD10EARX : Electronics](https://m.media-amazon.com/images/I/51SrdbjrBTL._AC_UF894,1000_QL80_.jpg)
Amazon.com: WD Green 1 TB Desktop Hard Drive: 3.5 Inch, SATA III, 64 MB Cache - WD10EARX : Electronics
![Amazon.com: Western Digital AV-GP WD10EURX 1TB IntelliPower 64MB Cache SATA 6Gb/s 3.5in Internal Hard Drive (for Surveillance) - 2 Years Warranty (Renewed) : Electronics Amazon.com: Western Digital AV-GP WD10EURX 1TB IntelliPower 64MB Cache SATA 6Gb/s 3.5in Internal Hard Drive (for Surveillance) - 2 Years Warranty (Renewed) : Electronics](https://m.media-amazon.com/images/I/61t0Mtu-xNL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Western Digital AV-GP WD10EURX 1TB IntelliPower 64MB Cache SATA 6Gb/s 3.5in Internal Hard Drive (for Surveillance) - 2 Years Warranty (Renewed) : 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
![Amazon.com: Western Digital 2TB WD Blue PC Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD20EZBX : Electronics Amazon.com: Western Digital 2TB WD Blue PC Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD20EZBX : Electronics](https://m.media-amazon.com/images/I/514DyIKQYYL.jpg)