Samsung 850 EVO 250GB 2.5-Inch SATA III Internal SSD (MZ-75E250B/AM) Storage Capacity: 250GB Solid State Drive. Form Factor: 2.5 drive. Interface: SATA 6Gb/s Interface (compatible with SATA 3Gb/s & SATA 1.5Gb/s interface). Sequential Read Speed: 540 MB/s. Sequential Write Speed: 520 MB/s.