The HP Envy 17 Notebook 17-u018ca Supports Single and Dual Drive Configurations. (One 2.5" Solid State Drive or Hard Drive and/or One M.2 NGFF (2280) Solid State Drive) Note: If the 2.5" Drive was not installed from HP, you will need the 2.5" Drive rubber bracket p/n 857826-001 and cable p/n 857835-001 for installation. (The M.2 slot supports SATA only Solid State Drives)