HUS724040ALA640 HGST Hitachi Ultrastar 7K4000 4TB 7200RPM SATA 6Gbps 64MB Cache (512n) 3.5-inch Internal Hard Drive
Hitachi HGST 4TB Internal 3.5" HMS5C4040ALE640 Hard Drive HDD 0f19847 SATA | eBay
HGST Ultrastar 4TB 7200RPM 64MB Cache SATA 6.0Gb/s 3.5inch Internal Desktop Hard Drive (for PC, Mac, NAS, RAID, Surveillance System) - 3 Year Warranty - Walmart.com
HGST MegaScale DC 4000.B HMS5C4040BLE640 (0F23139) 4TB Coolspin 64MB Cache SATA III 6.0Gb/s 3.5" Enterprise NAS Hard Drive - w/3 Year Warranty - Walmart.com
Amazon.com: HGST Deskstar NAS 3.5-Inch 4TB 7200RPM SATA III 64MB Cache Internal Hard Drive Kit (0S03664) : Electronics
Amazon.com: HGST Ultrastar 7K4000 HUS724040ALE641 4TB 64MB Cache 7200RPM SATA III 6.0Gb/s 3.5in Enterprise Internal Hard Drive(Renewed) : Electronics
Lot of 4 - 4TB HGST Ultrastar HUS724040ALA640 7200RPM SATA 6Gb/s 512e — 3R Technology