The Lenovo ThinkPad P1 Gen 5 Laptop Supports Single or Dual Drive Configuration Depending on the Graphics Card Installed. Models with Integrated Graphics or NVIDIA RTX A1000 / A2000 Graphics Support Single and Dual Drive Configurations. (Two M.2 NGFF (2280) Solid State Drive Slots) or Models with NVIDIA GeForce RTX A3000 / A4500 / A5500 Graphics Support Single Drive Configuration Only. (One M.2 NGFF (2280) Solid State Drive Slot)