The Dell Inspiron 15-3576 Laptop Supports Single Drive Configuration Only. (One 2.5" Solid State Drive or Hard Drive) or (One M.2 NGFF (2280) Solid State Drive in a Adapter Caddy) Note: The M.2 Drive uses a adapter caddy p/n TD7MH and is Installed in the 2.5" Drive bay. If replacing the M.2 Drive for a 2.5" Drive, you will need to keep the metal bracket p/n 51C9V and cable p/n 09P04 to install on the 2.5" Drive. (The M.2 slot supports SATA only Solid State Drives)