The Dell G3 3500 Gaming Laptop Comes in 2 Different Drive Options Depending on the Battery Installed and Supports Single and Dual Drive Configurations. (One 2.5" Solid State Drive or Hard Drive with the Smaller 3-cell 56Whr Battery Installed and/or One M.2 NGFF (2280) or (2230) Solid State Drive) or (Two M.2 NGFF (2280) or (2230) Solid State Drives with the Larger 4-cell 68Whr Battery Installed) Note: Models that have the larger 4-cell 68Whr battery installed do not support 2.5" Drives due to the larger battery occupying the 2.5" Drive bay. When the M.2 (2280) or (2230) Drive is installed in the primary M.2 slot with the smaller 56Whr battery installed, the M.2 Drive occupies the 2.5" Drive bay. M.2 slot 1 (SSD-1) supports M.2 (2280) and (2230) Drives by moving the drive mounting bracket to accommodate the form factor. M.2 slot 2 (SSD-2) supports M.2 (2280) Drives only.