The Dell Latitude 3300 Laptop Comes in 2 Different Drive Options from Dell and Supports Single Drive Configuration Only. (One M.2 (2280) or (2230) Solid State Drive) or (One eMMC Solid State Flash Drive) Note: Models equipped with a M.2 Solid State Drive are upgradable and replaceable. Models equipped with a eMMC Flash Drive are not, the eMMC Flash Drive is integrated on the system board and can not be replaced or upgraded. The M.2 slot supports both M.2 (2280) or (2230) Drives by moving the metal mounting extender bracket to accommodate the form factor. (The M.2 slot supports SATA and PCIe NVMe Solid State Drives)