SanDisk Ultra II 480GB Solid State Drive (SDSSDHII-480G-G25) Storage Capacity: 480GB Solid State Drive. Interface: SATA Revision 3.0 (6 GB/s). Form Factor: 2.5 inch. Sequential Read Speed: 550MB/s; Sequential Write Speed: 500MB/s. SanDisk's nCache 2.0 technology delivers enhanced speed and endurance.