Amazon.com: HGST Ultrastar 7K4000 4 TB 3.5" 7200 RPM SATA Internal Enterprise Hard Drive 64 MB Buffer 6.0Gb/s - HUS724040ALA640 / 0F14688 64 MB Cache 3.5-Inch Internal Bare or OEM Drives 0F14688 : Electronics
Lot of 2 - WD Western Digital 7200 RPM 3.5" IDE Hard Drive 160GB, 80GB | eBay
NeweggBusiness - Toshiba X300 4TB Performance Desktop and Gaming Hard Drive 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5 Inch Internal Hard Drive Retail Packaging HDWE140XZSTA
Seagate SkyHawk ST4000VX007 4 TB 3.5" Internal Hard Disk Drive (HDD) SATA III 6.0Gb/s 7200 RPM 64 MB | Fast Server Corp. www.srvfast.com
IBM AHD3 4 TB 7,200 rpm 6 Gb SAS NL 3.5 Inch HDD
Seagate IronWolf Pro 4TB NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5" Internal HDD ST4000NE001 - Walmart.com
IBM 500GB 7200 RPM 2.5" 6GBps SAS Hard Drive 42D0708 42D0711 42D0707 HDD | eBay
Dell 2TB 7200 RPM SATA 6Gbps 3.5in Hard Drive | Dell USA