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WD Blue 4TB Desktop Hard Disk Drive - 5400 RPM SATA 6Gb/s 256MB Cache 3.5 Inch - WD40EZAZ Desktop Internal Hard Drives - Newegg.com
Seagate ST4000DM000 F/W: CC54 P/N: 1F2168-568 SU S30 4TB Desktop Hard Drive
Cheap Western Digital WD40EZRZ 4TB 5.4K RPM SATA 6GBPS | Refurbished
Amazon.com: Seagate Backup Plus Hub 4TB External Hard Drive Desktop HDD – USB 3.0, for Computer Desktop Workstation PC Laptop Mac, 2 USB Ports, 2 Months Adobe CC Photography (STEL4000100), Model:STEL4000100 : Electronics
Dell 4TB 7200RPM SATA III 3.5-inch OEM Desktop Hard Drive 56RCV WD PN WD40EZRZ - Star Micro Inc