![Amazon.com: WD Green 2 TB Desktop Hard Drive: 3.5 Inch, SATA III, 64 MB Cache (WD20EARX) (Old Model) : Electronics Amazon.com: WD Green 2 TB Desktop Hard Drive: 3.5 Inch, SATA III, 64 MB Cache (WD20EARX) (Old Model) : Electronics](https://m.media-amazon.com/images/I/41bBp03BzhL.jpg)
Amazon.com: WD Green 2 TB Desktop Hard Drive: 3.5 Inch, SATA III, 64 MB Cache (WD20EARX) (Old Model) : Electronics
![Amazon.com: WD Green 2 TB Desktop Hard Drive: 3.5 Inch, SATA III, 64 MB Cache (WD20EARX) (Old Model) : Electronics Amazon.com: WD Green 2 TB Desktop Hard Drive: 3.5 Inch, SATA III, 64 MB Cache (WD20EARX) (Old Model) : Electronics](https://m.media-amazon.com/images/I/41bBp03BzhL._AC_UF894,1000_QL80_.jpg)
Amazon.com: WD Green 2 TB Desktop Hard Drive: 3.5 Inch, SATA III, 64 MB Cache (WD20EARX) (Old Model) : 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)
WD Purple 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD40PURZ - Walmart.com
![Amazon.com: WD Blue 1TB Mobile Hard Disk Drive - 5400 RPM SATA 6 Gb/s 9.5 MM 2.5 Inch - WD10JPVX : Electronics Amazon.com: WD Blue 1TB Mobile Hard Disk Drive - 5400 RPM SATA 6 Gb/s 9.5 MM 2.5 Inch - WD10JPVX : Electronics](https://m.media-amazon.com/images/I/61ad3wldK2L._AC_UF894,1000_QL80_.jpg)
Amazon.com: WD Blue 1TB Mobile Hard Disk Drive - 5400 RPM SATA 6 Gb/s 9.5 MM 2.5 Inch - WD10JPVX : Electronics
![Amazon.com: Western Digital Caviar Black 2 TB SATA III 7200 RPM 64 MB Cache Bulk/OEM Internal Desktop Hard Drive - WD2002FAEX : Electronics Amazon.com: Western Digital Caviar Black 2 TB SATA III 7200 RPM 64 MB Cache Bulk/OEM Internal Desktop Hard Drive - WD2002FAEX : Electronics](https://m.media-amazon.com/images/I/71VlefYc2WL.jpg)