This Machine Supports Single and Dual Drive Configurations. (One 2.5" Solid State Drive or Hard Drive and/or One M.2 NGFF (2242) Solid State Drive) Note: If the 2.5" Drive was not installed from HP, you will need the 2.5" Drive hardware kit p/n 69705-001 (Includes: Hard Drive Bracket, Hard Drive cable and Screws) for installation.