The Dell Latitude-5580 Laptop Comes in 2 Different Drive Options from Dell and Supports Single Drive Configuration Only. (One 2.5" Solid State Drive or Hard Drive) or (One M.2 NGFF (2280) Solid State Drive) Note: When the M.2 (2280) Drive is installed, the M.2 Drive occupies the 2.5" Drive bay. If replacing the 2.5" Drive for a M.2 Drive, you will need the M.2 Drive thermal support bracket p/n 3XDN4 and mounting bracket p/n 2FFR0 for installation. If replacing the M.2 Drive for a 2.5" Drive, you will need the 2.5" Drive caddy p/n 6F7DD and cable p/n 6NVFT for installation. (The M.2 slot supports SATA and PCIe NVMe Solid State Drives)