SEAGATE SKYHAWK ST4000VX007 4TB 5.9K 6Gb/s 3.5" AF SATA HDD | eBay
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Refurbished: Seagate ST4000VX007 SkyHawk ST4000VX007 4 TB Hard Drive - Internal - SATA (SATA/600) Desktop Internal Hard Drives - Newegg.com
Seagate SkyHawk 4TB Surveillance Hard Drive - SATA 6Gb/s 64MB Cache 3.5-Inch Internal Drive (ST4000VX007)
Seagate SkyHawk 4TB Surveillance Hard Drive 3.5" - Newegg.com