The Dell Inspiron 15-5584 Laptop Supports Single and Dual Drive Configurations. (One 2.5" Solid State Drive or Hard Drive and/or One M.2 NGFF (2280) or (2230) Solid State Drive) Note: The M.2 slot supports M.2 (2280) and (2230) Drives by moving the metal mounting bracket to accommodate the form factor. If the 2.5" Drive was not installed from Dell, you will need the 2.5" Drive bracket and cable for installation. (The M.2 slot supports PCIe NVMe Solid State Drives)