IronWolf™ is designed for everything NAS. Get used to tough, ready and scalable 24×7 performance that can handle multi-drive environments with a wide range of capacities.Capacity: 4TBInterface:SATA 6Gb/sCache: 64MBDrive bays supported: 1 to 8Transfer Rate :180MB/sVoltage (5V):±5%Voltage (12V): ±10%Cycles: 600,000Dimensions (HxWxD): 26.11 x 101.6 x 146.99mmWeight: 610g