The Asus PX512LI Laptop Supports 1, 2 or 3 Drive Configurations. (Three M.2 NGFF (2280) Solid State Drives) Note: M.2 slot 1 (SSD-1) and M.2 slot 3 (SSD-3) support SATA and PCIe NVMe Solid State Drives and M.2 slot 2 (SSD-2) supports PCIe NVMe only Solid State Drives.