The Dell Precision 3580 Mobile Workstation Supports Single and Dual Drive Configurations. (One M.2 (2280) SSD and/or One M.2 (2230) SSD or Two M.2 (2230) SSD's) Note: M.2 slot-1 (SSD1) supports both M.2 (2280) and (2230) Drives by moving the M.2 SSD mounting bracket to accommodate the form factor. M.2 Slot-2 (SSD2) supports M.2 (2230) Drives Only.