The Dell Alienware m17 R5 Laptop Supports Single or Dual Drive Configuration Depending on the Video Card Installed. Dual Drive Configuration with NVIDIA RTX 3060/3070/3080 or Radeon RX 6700M/6850M Video Cards Installed: (Two M.2 NGFF (2280) or (2230) Solid State Drives) - Single Drive Configuration with NVIDIA RTX 3050 Video 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 (SSD-1) supports up to 4TB PCIe NVMe Generation 4.0 x4 and 3.0 x4 Solid State Drives and (when present) M.2 slot 2 (SSD-2) supports up to 2TB PCIe NVMe Generation 4.0 x4 and 3.0 x4 Solid State Drives)