Seagate 4TB BarraCuda SATA 6Gb/s 256MB Cache 3.5-Inch Internal Hard Drive (ST4000DM004) Single Pack - Walmart.com
Seagate SkyHawk ST4000VX007 4 TB Hard Drive - Internal - SATA (SATA/600) | eBay
Seagate BarraCuda HDD, SATA 6G, 5400RPM, 2.5 inch - 4TB [HDSG-081] from WatercoolingUK
Seagate BarraCuda 4 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s 5400 RPM 256 MB Cache for Computer Desktop PC Laptop (ST4000DM004) : Amazon.co.uk: Computers & Accessories
Seagate Enterprise ST4000NM0035 4000GB Serial ATA III internal hard drive - internal hard drives (4000 GB, Serial ATA III, 7200 RPM, 3.5", HDD, 128 MB) : Amazon.co.uk: Computers & Accessories