The Lenovo Legion 5P-15IMH05H Laptop Supports Single or Dual Drive Options Depending on the Battery Installed. (Option 1 with the Smaller 4-cell 60Whr Battery Installed: One 2.5" Solid State Drive or Hard Drive and/or One M.2 NGFF (2280) or (2242) Solid State Drive) or (Option 2 with the Smaller 4-cell 60Whr Battery Installed: Two M.2 NGFF (2280) or (2242) Solid State Drives) or (Option 1 with the Larger 4-cell 80Whr Battery Installed: Two M.2 NGFF (2280) or (2242) Solid State Drives) Note: Models that have the larger 4-cell 80Whr battery installed do not support 2.5" Drives due to the larger battery occupying the 2.5" Drive bay. Models that have the 2.5" Drive installed with the smaller 60Whr battery do not support the second M.2 Drive due to the 2.5" Drive occupying the M.2 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 in models with the smaller 60Whr battery, you will need the 2.5" Drive bracket p/n 5B40S21997 and cable p/n 5C10S30072 for installation. (Both M.2 slots support PCIe NVMe Solid State Drives)