The Acer Chromebook Enterprise Spin 514 CP514-3H 2-in-1 Comes in 2 Different Drive Options from Acer and Supports Single Drive Configuration Only. (One M.2 NGFF (2280) Solid State Drive) or (One 32GB, 64GB or 128GB eMMC Solid State Flash Drive) Note: Models equipped with a M.2 (2280) Solid State Drive are upgradable. Models equipped with a eMMC Flash Drive are Not, the eMMC Flash Drive is integrated onto the system board and cannot be replaced or upgraded. We recommend to verify what type Solid State Drive your model has installed before ordering.