Integral 256GB SSD. Solid-state drive capacity: 256 GB, Size: 63.5 mm (2.5 "), Solid-state drive interfaces: Serial ATA II. Read speed: 270 MB/s, Write speed: 200 MB/s, Data transfer rate: 3 Gbit/s. Operating voltage: 5 V, Power consumption (read): 1.4 W, Power consumption (write): 4.7 W. Mean time between failures (MTBF): 1000000 h. Operating temperature range (T-T): 0 - 70 °C, Storage temperature range (T-T): -40 - 85 °C, Storage relative humidity range: 0 - 95 %