https://www.westerndigital.com/en-au/products/internal-drives/wd-purple-pro-sata-hdd?sku=WD8002PURP

Western Digital WD8002PURP, WD Purple Pro 8TB 3.5″ Surveillance HDD 7200RPM 256MB SATA3 245MB/s 550TBW 24×7 64 Cameras AV NVR DVR 2.5mil MTBF, 5 Year Warranty