HGST HDN724040ALE640 - 4TB 3.5" SATA 7,200 RPM 6Gb/s Hard Drive

Western Digital

HGST WUH721816ALE6L4 - HGST 16TB 3.5" SATA 7.2K 6Gb/s Hard Drive

Hitachi

HGST/WD Ultrastar 4TB 7200 RPM 512e SATA 6Gb/s 3.5-Inch Enterprise Hard Drive (HUS726T4TALE6L4)

HITACHI 3.5" 4TB 7.2K SATA 6Gb/s HARD DRIVE

SEAGATE 4TB 6Gb/s 7.2K 128MB 512e SATA 3.5" Hard drive

Hitachi

HGST Ultrastar 7K6000 HUS726040ALE610 (0F23005) 4TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Enterprise Hard Drive Bare Drive

HP

HP 693689-B21 4TB 7200 RPM 128MB SAS 6Gb/s 3.5" Hard Drive

Western Digital

WD Blue 4TB Desktop Hard Disk Drive - 5400 RPM SATA 6Gb/s 64MB Cache 3.5 Inch - WD40EZRZ

WD Purple 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD40PURX

Seagate

Seagate BarraCuda ST4000DM004 4TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drive