The HP EliteBook 720 G1 Notebook 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 replacing the 2.5" Hard Drive for a 2.5" Solid State Drive, remove the bracket and interposer connector from the Hard Drive and install it on the Solid State Drive.