M.2 NVMe SSD 500GB  Samsung SSD 960 EVO, Interface: PCIe3.0 x4 / NVMe1.2, M2 Type 2280 form factor, Sequential Read: 3200 MB/s, Sequential Write: 1800 MB/s, Max Random 4k: Read / Write: 330,000 IOPS, Samsung Polaris controller, 3D TLC V-NAND