The Asus W730G2T Laptop Supports 1, 2 or 3 Drive Configurations Depending on the Battery Installed. (Options with the Smaller 4-cell 62Whr/63Whr Battery Installed: One 2.5" Solid State Drive or Hard Drive and/or Two M.2 NGFF (2280) Solid State Drives) or (Options with the Larger 6-cell 95Whr/97Whr Battery Installed: Two M.2 NGFF (2280) Solid State Drives) Note: Models that have the larger 6-cell 95Whr/97Whr battery installed do not support a 2.5" Drive due to the larger battery occupying the 2.5" Drive bay. If the 2.5" Drive was not installed from Asus in models with the smaller 4-cell 62Whr/63Whr battery installed, you will need the 2.5" Drive caddy and cable for installation. (Both of the M.2 slots support PCIe NVMe Solid State Drives)