Amazon.com: Toshiba 4TB 3.5" SATA 6Gb/s 7200 RPM 128M Enterprise Hard Drive - MG04ACA400N : Electronics
HP 4TB 7200 rpm SAS-2 3.5" Internal SC Midline Hard 695510-B21
1FT278-031 - EMC 4TB 7200 RPM SAS 3.5" HDD for Unity 300, 400, 500, 600 serie... | eBay
Synology HAT5300-4T 4TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Enterprise 3.5" SATA HDD Retail - Walmart.com
WD Red Pro 4TB 7200 RPM 3.5" Internal Hard Drive - Newegg.com
Seagate IronWolf Pro 4TB NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5" Internal HDD ST4000NE001 - Walmart.com
Seagate FireCuda 4TB 7200 RPM SATA III 6Gb/s 3.5" Internal CMR Hard Drive - Micro Center
Seagate Enterprise Capacity 3.5'' HDD 4TB 7200 RPM 512e SATA 6Gb/s 128MB Cache Internal Hard Drive ST4000NM0115 - Newegg.com
Amazon.com: WD 4TB 7200 RPM SATA 6 Gb/s 64MB Cache, 3.5-Inch Desktop Hard Disk Drive (WD4003FZEX) : Electronics
Amazon.com: Western Digital 4TB 3.5 Inch SATA III, 7200 RPM, 64 MB Cache Enterprise Hard Drive (Western Digital4000FYYZ) : Electronics
Seagate FireCuda 4TB 7200 RPM SATA III 6Gb/s 3.5" Internal CMR Hard Drive - Micro Center
HP 4TB SATA 7200 Hard Drive | HP® Middle East
Amazon.com: HP 695842-001 4TB SAS Hard Drive Disk (HDD) - 7,200 RPM, 3.5-inch form factor, SmartDrive Carier (SC), Midline (MDL), 6Gb per second Transfer Rate (TR) : Electronics
118033264-03 - EMC 4TB 7200 RPM SAS 3.5" HDD for VNX5100, 5300, 5200, 5400, 5... | eBay
Amazon.com: Seagate Enterprise 4TB Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 7200 RPM, 256MB Cache (ST4000NM004C) : Electronics
Seagate FireCuda ST4000DX005 4TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal HDD Bare Drive - Walmart.com