Western Digital 8TB WD Purple Surveillance Internal Hard Drive - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD81PURZ (Old Version)
Wd Purple 8tb 10tb 12tb Pro 3.5" Surveillance Hdd Sata 6 Gb/s 7200rpm 256mb Monitoring Hard Drive For Video Recorder Nvr - Solid State Drives - AliExpress