Ubiquiti Enterprise 3.5" HDD, 8 TB SKU: UACC-HDD-E-8TB Tech Specs: Click Here Description: Enterprise-grade 3.5" SATA hard drive ideal for storage-intensive UniFi camera security and NAS systems. Compatibility: UDM-SE, , UDM-Pro-Max,UNVR-Pro,ENVR,UNVR,UDM-Pro, UNAS-Pro Features: •Workload rating: 550 TB/year •Mean time between failure (MTBF): 2 million hours