M.2 SATA SSD 256GB Verbatim Vi560 S3, SATA 6Gb/s, M.2 Type 2280 form factor, Sequential Reads: 560 MB/s, Sequential Writes: 460 MB/s, Max Random 4k: Read: 102,000 IOPS / Write: 80,000 IOPS, Phison Controller, 3D NAND TLC