The Dell Inspiron 13 5000 (5391) 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 in the WWAN Slot) Note: The primary M.2 slot 1 supports M.2 (2280) or (2230) Drives and the secondary M.2 slot 2 supports M.2 (2230) Drives only and can be Installed in replace of the WWAN Card. The M.2 (2230) Drive Installed in the primary slot uses a support bracket to accommodate for the larger M.2 (2280) slot. (Both M.2 slots support PCIe NVMe Solid State Drives)