Seagate Barracuda 3TB Surveillance Hard Drive - SATA 6Gb/s 64MB Cache 3.5-Inch Internal Drive (ST3000LM024)
Seagate Skyhawk 1tb/2tb/3tb/4tb/6tb/8tb Surveillance Internal Hard Drive 3.5 Inch Hdd For Dvr Nvr Security Camera System - Hard Disk Drive - AliExpress