Seagate SkyHawk AI ST20000VE002 - hard drive - 20 TB - SATA 6Gb/s
Amazon.com: Seagate Skyhawk AI 10TB Video Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with in-house Rescue Services (ST10000VEZ01) : Electronics