The HP Envy 15 Notebook 15-as043tu 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 857797-001 and cable p/n 857806-001 for installation. (The M.2 slot supports SATA and PCIe NVMe Solid State Drives)