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Seagate 4TB BarraCuda SATA 6Gb/s 256MB Cache 3.5-Inch Internal Hard Drive (ST4000DM004) Single Pack - Walmart.com
4TB SATA Toshiba N300 HDWQ140 HDEXR01GCA51 7200rpm 128MB HDD 3.5 " Hard Drive | eBay
Seagate SkyHawk 4TB Surveillance Hard Drive - SATA 6Gb/s 64MB Cache 3.5-Inch Internal Drive (ST4000VX007)
ST4000NM0023 Seagate 4TB 3.5 inch SAS Server Enterprise Hard Drive