Amazon.com: Seagate Skyhawk 6TB Surveillance Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with Drive Health Management (ST6000VX0023) : Electronics
Seagate ST6000VX0003 SkyHawk 6TB 256MB SATA 6GB 3.5" AF Surveillance HDD | eBay
Seagate 6TB SkyHawk Surveillance SATA III 3.5" ST6000VX001 B&H
Hard Drive Seagate SURVEILLANCE 4TB 5900U/Min 64MB SATA III ST4000VX000 3.5'' | eBay