The Alienware m16 R1 Gaming Laptop Supports Either 2 Drive Configurations or 4 Drive Configurations Depending on the Graphics Card Installed. Computers shipped with a NVIDIA GeForce RTX 4080/4090 graphics card installed have Two M.2 2280 (Slot-1 SSD1 / Slot-2 SSD2) and Two M.2 2230 (Slot-3 SSD3 / Slot-4 SSD4) Solid State Drive slots, whereas Computers shipped with a NVIDIA GeForce RTX 4060/4070/4080 graphics card Installed have only Two M.2 2280 (Slot-1 SSD1 / Slot-2 SSD2) Solid State Drive slots. M.2 slot-1 (SSD1) and M.2 slot-2 (SSD2) support both M.2 2280 and M.2 2230 Drives by moving the drive mounting screw to accommodate the form factor. M.2 slot-3 (SSD3) and M.2 slot-4 (SSD4) "when present" support M.2 2230 Drives Only. (All Four M.2 slots support Gen4.0 x4 PCIe NVMe Solid State Drives and can be set up as RAID-0, RAID-1, RAID-5)