Amazon.com: Seagate IronWolf ST4000VN006 4 TB Hard Drive - 3.5" Internal - SATA (SATA/600) - Conventional Magnetic Recording (CMR) Method : Electronics
Amazon.com: Seagate 4TB IronWolf NAS SATA Hard Drive 6Gb/s 256MB Cache 3.5-Inch Internal Hard Drive for NAS Servers, Personal Cloud Storage (ST4000VN008), Silver : Electronics
Seagate Surveillance ST4000VX000 4TB HDD Review
4TB Seagate Constellation ES.3 3.5" SATA 7200RPM HDD Hard Drive ST4000NM0033 | eBay