The HP Pro x360 Fortis 11 inch G9 Notebook Comes in 2 Different Drive Options from HP and Supports Single Drive Configuration Only. (One M.2 NGFF (2230) Solid State Drive) or (One eMMC Solid State Flash Drive) Note: Models equipped with a M.2 Solid State 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. (The M.2 slot supports PCIe NVMe Solid State Drives)