Seagate ST6000VX001 SkyHawk HDD 3.5" 6TB SATA-III 5400rpm Cache 256MB Warranty 3 Year - Vnix Group Co.,Ltd.
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