The Dell Latitude 15 3000 (3590) Laptop Supports Single and Dual Drive Configurations. (One 2.5" Solid State Drive or Hard Drive and/or One M.2 NGFF (2280) Solid State Drive) Note: If the 2.5" Drive was not installed from Dell, you will need the 2.5" Drive caddy p/n N7TMM and cable p/n 2W8FH for installation. If the M.2 Drive was not installed from Dell, you will need the M.2 thermal support bracket p/n HM4TX for installation. (The M.2 slot supports SATA and PCIe NVMe Solid State Drives)