Western Digital SiliconEdge Blue 64GB. Solid-state drive capacity: 64 GB, Size: 63.5 mm (2.5 "), Solid-state drive interfaces: Serial ATA II. Read speed: 250 MB/s, Write speed: 170 MB/s, Data transfer rate: 3 Gbit/s. Operating voltage: 5 V, Power consumption (standby): 0.60 W, Power consumption (read): 2.00 W. Mean time between failures (MTBF): 1400000 h. Operating temperature range (T-T): 0 - 70 °C, Storage temperature range (T-T): -55 - 125 °C, Operating relative humidity range: 8 - 95 %