Western Digital WD Black SN750 250GB M.2 2280 PCIe 3.0 x4 NVMe 1.3 Internal Solid State Drive, SanDisk 64-layer 3D TLC NAND, Up to 3,100 MB/s Sequential Read, 1,600 MB/s Sequential Write, 220K IOPS Random Read, 180K IOPS Random Write, 200 TBW Endurance