The Lenovo IdeaPad 310S-11IAP Laptop Comes in 2 Different Drive Options from Lenovo and Supports Single Drive Configuration Only. (One 2.5" Solid State Drive or Hard 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 are upgradable.