Seagate IronWolf Pro ST4000NT001 internal hard drive 4 TB 7200 RPM 256 MB 3.5"

Storage drive buffer size: 256 MB Component for: NAS HDD interface transfer rate: 6 Gbit/s Type: HDD Noise level (idle): 28 dB HDD speed: 7200 RPM HDD sustained transfer rate: 250 MiB/s HDD size: 3.5" HDD capacity: 4 TB Workload rate limit: 550 TB/year Mean time between failures (MTBF): 2000000 h Rotational Vibration (RV) sensors: Yes Operating voltage: 5 / 12 V Power consumption (idle): 5.5 W Power consumption (off): 1 W Start-up current: 2 A Power consumption (standby): 1 W Power consumption (typical): 8.7 W Non-operating shock: 300 G Non-operating vibration: 2.27 G Storage temperature (T-T): -40 - 70 °C Operating shock: 70 G Operating temperature (T-T): 0 - 65 °C Weight: 650 g Depth: 147 mm Width: 101.8 mm Height: 26.1 mm Warnings: Do not open or disassemble.