Synology HAT5310-20T HDD 20 TB (7200 RPM, 3.5 Inch HDD, 6.0 GB/s) Black

Enterprise-class reliability and durability: Designed for demanding and 24/7 environments, designed for a medium lifetime (MTBF)3 of up to 2.5 million hours and workloads up to 550 TB per year | Persistent write cache technology: minimizes the risk of data corruption in the event of a power failure | Better performance: Firmware and DiskStation Manager (DSM) optimizations improve sequential reading performance on multiple clients by up to 23% | Updates from a single source: firmware updates with one click in DSM minimise maintenance effort | From Synology for Synology: Strict validations and up to 500,000 hours of testing ensure maximum reliability in Synology systems