M.2 NVMe SSD 4.0TB Samsung SSD 990 PRO w/Heatsink RGB Lights, PCIe4.0 x4 / NVMe2.0, M2 Type 2280 form factor, Seq. Read: 7450 MB/s, Seq. Write: 6900 MB/s, Max Random 4k: Read /Write: 1600,000/1550,000 IOPS, Samsung in-house Controller, 4GB LPDDR4, 2400TB