The Dell Vostro 5515 Laptop Supports Single and Dual Drive Configurations. (One M.2 NGFF (2280) or (2230) Solid State Drive in Slot 1 and/or One M.2 NGFF (2230) Solid State Drive in Slot 2) Note: M.2 slot 1 supports M.2 (2280) and (2230) Drives by moving the drive mounting bracket to accommodate the form factor. M.2 slot 2 supports M.2 (2230) Drives only. (Both M.2 slots support PCIe NVMe Solid State Drives)