The Acer TravelMate P6 TMP658-MG Laptop comes in 2 Different Drive Options from Acer and Supports Single and Dual Drive Configurations. (One 2.5" Solid State Drive or Hard Drive and/or One M.2 NGFF (2280) Solid State Drive in the Primary M.2 Slot) or (One M.2 NGFF (2280) Solid State Drive in the Primary M.2 Slot and/or One M.2 NGFF (2280) Solid State Drive in a Converter Bracket) Note: Models that have the second M.2 Drive Installed, the second M.2 Drive occupies the 2.5" bay using a M.2 converter bracket and interposer board. If replacing the 2.5" Drive for a M.2 Drive, you will need the M.2 SSD converter board and the M.2 SSD cable for installation. If the 2.5" Drive was not installed from Acer, you will need the 2.5" Drive bracket and cable for installation. (This machine supports SATA only M.2 Solid State Drives)