The Lenovo IdeaPad 3-17IRU7 Laptop Supports Single or Dual Drive Configurations Depending on the Battery Installed. (One 2.5" Solid State Drive or Hard Drive + One M.2 NGFF (2242) Solid State Drive with the Smaller 38Whr Battery Installed) or (One M.2 NGFF (2242) Solid State Drive with the Larger 45Whr Battery Installed) Note: Models that have the larger 45Whr battery installed do not support 2.5" Drives due to the larger battery occupying the 2.5" Drive bay. If the 2.5" Drive was not installed from Lenovo in models with the smaller 38Whr battery installed, you will need the 2.5" Drive caddy p/n 5C10830232 and cable p/n 5B40S22058 for installation.