The Alienware m17 R5 Laptop Supports Single or Dual Drive Configuration Depending on the Graphics Card Installed. Dual Drive Configuration with NVIDIA RTX 3060/3070/3080 or Radeon RX 6700M/6850M Graphics Cards Installed: (Two M.2 NGFF (2280) or (2230) Solid State Drives) - Single Drive Configuration with NVIDIA RTX 3050 Graphics Card Installed: (One M.2 NGFF (2280) or (2230) Solid State Drive) Note: The M.2 2280 and 2230 Drives each use a unique thermal heat shield bracket and cannot be interchanged. Both M.2 slots support M.2 2280 and 2230 Drives by moving the drive mounting bracket p/n 0MHKK8 to accommodate the form factor. M.2 slot-1 (SSD1) supports up to 4TB PCIe NVMe Gen4.0 x4 and Gen3.0 x4 Solid State Drives and "when present" M.2 slot-2 (SSD2) supports up to 2TB PCIe NVMe Gen4.0 x4 and Gen3.0 x4 Solid State Drives)