Seagate SkyHawk 2TB Surveillance Hard Drive - SATA 6Gb/s 64MB Cache 3.5-Inch Internal Drive (ST2000VX008)

TIGERSECU Super HD 1080P H.265+ 16-Channel Hybrid 5-in-1 DVR NVR Security Video Recorder, Supports Analog and ONVIF IP Cameras (Cameras and Hard Drive Not Included)

Amcrest ProHD 1080P 16CH Video Security DVR Digital Recorder, 16-Channel 1080P, Supports 960H/HDCVI/HDTVI/AHD/Amcrest IP, HDD & Cameras NOT Included, Remote Smartphone Access (AMDV108116-H5)

Seagate Skyhawk 2TB Surveillance Internal Hard Drive HDD - 3.5 Inch SATA 6Gb/s 64MB Cache for DVR NVR Security Camera System with Drive Health Management - Frustration Free Packaging (ST2000VX008)

Seagate Skyhawk 4TB Surveillance Internal Hard Drive HDD - 3.5 Inch SATA 6GB/s 64MB Cache for DVR NVR Security Camera System with Drive Health Management - Frustration Free Packaging (ST4000VX007)

Seagate SkyHawk 8TB Surveillance Internal Hard Drive HDD 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with Drive Health Management (ST8000VX0022)

Seagate Skyhawk 8TB Surveillance Internal Hard Drive HDD - 3.5 Inch SATA 6GB/s 256MB Cache for DVR NVR Security Camera System with Drive Health Management - Frustration Free Packaging (T8000VX0022)

Seagate Skyhawk 1TB Surveillance Internal Hard Drive HDD - 3.5 Inch SATA 6Gb/s 64MB Cache for DVR NVR Security Camera System with Drive Health Management - Frustration Free Packaging (ST1000VX005)

Seagate SkyHawk 3TB Surveillance Internal Hard Drive HDD - 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with Drive Health Management (ST3000VX010)

WD Purple 2TB Surveillance Hard Drive - 5400 RPM Class, SATA 6 Gb/s, 64 MB Cache, 3.5" - WD20PURZ

Seagate SkyHawk 1TB Surveillance Hard Drive - SATA 6Gb/s 64MB Cache 3.5-Inch Internal Drive (ST1000VX005)