The Lenovo Flex 3-11IGL05 Laptop Comes in 2 Different Drive Options from Lenovo and Supports Single Drive Configuration Only. (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 M.2 (2242) Drive are upgradable. (The M.2 slot supports PCIe NVMe Solid State Drives)