The Lenovo Legion 5P-15ARH05H Laptop Comes in 2 Different Drive Options and Supports Single and Dual Drive Configurations. (One 2.5" Solid State Drive or Hard Drive and/or One M.2 NGFF (2280) or (2242) Solid State Drive) or (Two M.2 NGFF (2280) or (2242) Solid State Drives) Note: Models that have the secondary M.2 (2280) or (2242) Drive installed do not support the 2.5" Drive due to the M.2 Drive occupying the 2.5" Drive bay. The primary M.2 slot supports M.2 (2280) and (2242) Drives by moving the mounting standoff bracket p/n L81Y6 to accommodate the form factor. The secondary M.2 slot supports M.2 (2242) Drives with a adapter bracket p/n 5B40S21899 to accommodate for the larger M.2 (2280) slot. If the 2.5" Drive was not installed from Lenovo in models with no secondary M.2 (2280) or (2242) Drive, you will need the 2.5" Drive caddy p/n 5B40S21997 and cable p/n 5C10S30072 for installation. (The M.2 slots support PCIe NVMe Solid State Drives)