The Lenovo IdeaPad Slim S 1-14AST-05 Laptop Comes in 3 Different Drive Options from Lenovo and Supports Single Drive Configuration Only. (One 2.5" Solid State Drive or Hard Drive or One M.2 NGFF (2242) Solid State Drive or One eMMC Solid State Flash Drive) Note: Models that have a eMMC Flash Drive are not upgradable, the eMMC Flash Drive is integrated on the system board and can not be upgraded or replaced. Models with a 2.5" Drive or a M.2 (2242) Drive are upgradable.