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
goHardDrive.com - HGST Deskstar HDN726040ALE614 (0F26902) 4TB 7200RPM 128MB Cache SATA 6.0Gb/s 3.5" NAS Hard Drive (Factory Recertified) - 3 Year Warranty
HGST WD 0F23005 Hard Drive SATA-6GBPS 4TB-7.2K RPM | Refurbished
Price history & Review on Original HGST 4TB Hard Drive HDD 7200rpm 64MB Cache SATA III 3.5" Desktop Server Monitoring Hard Drive | AliExpress Seller - 3C World Store | Alitools.io
HGST Ultrastar 7K4000 4TB SATA 6GB/s 3 5" 7 2K 64MB Hard Drive HUS724040ALE640