The Asus CM5500FDA Laptop Comes in 2 Different Drive Options from Asus and Supports Single Drive Configuration Only. (One M.2 NGFF (2280) Solid State Drive) or (One eMMC Solid State Flash Drive) Note: Models equipped with a M.2 2280 Drive are upgradable. Models equipped with a eMMC Flash Drive are not, the eMMC Flash Drive is integrated on the system board and is not upgradable. We recommend to verify what type Solid State Drive your model has installed before ordering.