The Dell Precision 5770 Mobile Workstation Supports Single and Dual Drive Configurations. (Two M.2 NGFF (2280) or (2230) Solid State Drives) Note: The M.2 (2280) and (2230) Drives each use a unique thermal plate for Slot-1 (SSD1) and Slot-2 (SSD2) and cannot be interchanged.