The HP x2 210 G2 Detachable Notebook Supports Single and Dual Drive Configurations. (One eMMC Flash Drive in the Tablet + One 2.5" Solid State Drive or Hard Drive in the Dock) Note: The eMMC Flash Drive in the Tablet is integrated on the system board and is not upgradable. If the 2.5" Drive was not installed from HP in the dock, you will need the 2.5" Drive bracket hardware kit p/n 902362-001 and docking board p/n 902372-001 for installation.