The HP Elite Dragonfly G3 Notebook Supports Single Drive Configuration Only. (One M.2 NGFF (2280 or 2230) Solid State Drive) Note: The M.2 slot supports M.2 (2280) and (2230) Solid State Drives by moving the SSD support bracket to accommodate the M.2 Drive form factor. (The M.2 slot supports PCIe NVMe Generation 4.0 x4 and 3.0 x 4 Solid State Drives)