Amazon.com: WD 4TB 7200 RPM SATA 6 Gb/s 64MB Cache, 3.5-Inch Desktop Hard Disk Drive (WD4003FZEX) : Electronics
Western Digital RE WD4000FYYZ 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive - w/3 Years Warranty - Walmart.com
Amazon.com: Western Digital RE WD4000FYYZ 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5in Enterprise Internal Hard Drive - OEM w/3 Year Warranty (Renewed) : Electronics
0F22948 – NetApp 4TB 7200 RPM SAS 3.5″ HDD for DS4243, DS4246 24 bay enclosures – Disk Drive Finder
Dell 9ZM270-150 4TB 3.5" SAS Hard Disk Drive HDD (ST4000NM0023)
HUS724040ALS641 – Netapp 4TB 7200 RPM SAS 3.5″ HDD for E-Series 12 bay DE1600, E2612, E2712, E5412, E5512, E5612 DA and FDE enabled – Disk Drive Finder
Amazon.com: WD 4TB 3.5 Inch SATA III, 7200 RPM, 64 MB Cache Enterprise Hard Drive (WD4000FYYZ) (Renewed) : Electronics
NeweggBusiness - Seagate Enterprise Capacity 3.5 ST4000NM0025 4TB 7200 RPM 128MB Cache SAS 12Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
Western Digital RE WD4000FYYZ 4TB 7200 RPM 64MB 6Gb/s 3.5" SATA Hard D
Amazon.com: WD Red Pro 4TB NAS Hard Disk Drive - 7200 RPM SATA 6 Gb/s 64MB Cache 3.5 Inch - WD4001FFSX : Electronics
HGST HUS726T4TALE6L4 Ultrastar 4TB 7200 RPM 512e SATA 6Gb/s 3.5-Inch Internal Hard Disk Drive
X477A-R6 – NetApp 4TB 7200 RPM SAS 3.5″ HDD for DS4243, DS4246 24 bay enclosures – Disk Drive Finder
Amazon.com: Seagate Enterprise 4TB Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 7200 RPM, 256MB Cache (ST4000NM004C) : Electronics
HGST 4TB 3.5" SATA3 HDD-T4TB-HUS726T4TALE6L4 Internal Enterprise Hard Drive
HGST Deskstar NAS 3.5" 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s High-Performance Hard Drive for Desktop NAS Systems Retail Packaging - Newegg.com
WD Red Pro 4TB 7200 RPM 3.5" Internal Hard Drive - Newegg.com
0F27001 – EMC 4TB 7200 RPM SAS 3.5″ HDD for VNX5100, 5200, 5300, 5400, 5500, 5600, 5700, 5800, 7500, 7600, 8000 series 15 disk enclosures and VNXe3300 – Disk Drive Finder
Seagate FireCuda 4TB 7200 RPM SATA III 6Gb/s 3.5" Internal CMR Hard Drive - Micro Center
WD 4TB Desktop Performance 7200 rpm SATA III 3.5" WD4005FZBX B&H
Western Digital RE WD4000FYYZ 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive - w/3 Years Warranty - Walmart.com
Seagate FireCuda 4TB 7200 RPM SATA III 6Gb/s 3.5" Internal CMR Hard Drive - Micro Center