The Panasonic ToughPad FZ-Q1 comes in 3 Different Storage options from Panasonic and Supports Single and Dual Drive Configurations. (One mSATA Solid State Drive) or (One eMMC Solid State Flash Drive) or (One mSATA Solid State Drive and/or One eMMC Solid State Flash Drive) Note: Some models with a eMMC Drive do not have the additional mSATA slot on the system board. Verify before ordering. Models that have a eMMC Flash Drive only are not upgradable, the eMMC Flash Drive is integrated on the system board and can not be upgraded or replaced. Models with a mSATA slot are upgradable.