The Dell Alienware m15 R7 Laptop Supports Single or Dual Drive Configuration Depending on the Video Card Installed. Dual Drive Configuration with NVIDIA RTX 3060/3070/3080 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. The M.2 (2230) Drive uses thermal bracket p/n 0V60J9 and the M.2 (2280) Drive uses thermal bracket p/n 02FHJR. Both M.2 slots support M.2 (2280) and (2230) Drives by moving the drive mounting bracket p/n 0X8MY9 to accommodate the form factor. (Both M.2 slots support PCIe NVMe Generation 4.0 x4 and 3.0 x4 Solid State Drives)