Style:GIGABYTE UD PRO 256GB (GP-GSTFS30256GTTD) Form Factor: 2.5-inch internal SSD Interface: SATA 6.0Gb/s Total Capacity: 256GB Sequential Read speed : up to 530 MB/s Sequential Write speed : up to 500 MB/s Toshiba 3D TLC NAND Flash offers blazing speed, high capacity & enhanced reliability. External DDR3 DRAM Cache for Better Sustain Speed TRIM & S.M.A.R.T supported.