 "Seagate Barracuda ST4000DM004 - hard drive 4 TB SATA 6Gb/s" " Seagate 6Gb/s Internal Desktop Hard Drives CDW.com
"Get the most out of your storage with BarraCuda hard drives. From computers full of photos and memories to gaming PCs that need more room to play, BarraCuda grows with you." 
 "WD Blue 4TB Desktop Hard Disk Drive - 5400 RPM SATA 6 Gb/s 64MB Cache 3.5 Inch WD40EZRZ"@en-US "Data Storage Page | Laptops Outlet Direct"@en-US
"WD Blue PC Hard Drives. High Capacity, Proven Reliability. WD expands their award-winning desktop and mobile storage lineup with WD Blue PC hard drives. Extensively tested and built to WD's high standards, WD Blue offers a wide variety of capacities-ranging from 250 GB to the massive 6 TB-in both desktop and mobile models. Drive WD Blue with confidence-our colors never fade."@en-US 