The Asus BR1402F 2-in-1 Flip Notebook Comes in 2 Different Drive Options from ASUS and Supports Single and Dual Drive Configurations. (One UFS 2.1 Solid State Flash Drive with One Empty M.2 Slot) or (One M.2 NGFF (2280) Solid State Drive and One UFS 2.1 Solid State Flash Drive) Note: UFS 2.1 Flash Drives are integrated onto the system board and are not upgradable or removeable. For additional storage, install a M.2 2280 Solid State Drive in the empty M.2 slot.