The Dell Inspiron 5518 Laptop Supports Single and Dual Drive Configurations. (One M.2 NGFF (2280) or (2230) Solid State Drives and/or One M.2 NGFF (2230) Solid State Drive) Note: The primary M.2 slot 1 supports M.2 (2280) or (2230) Drives by moving the metal mounting bracket to accommodate the form factor. The secondary M.2 slot 2 supports M.2 (2230) Drives only. (Both M.2 slots support PCIe NVMe Solid State Drives)