The Dell Latitude-3301 Laptop Supports Single and Dual Drive Configurations. (One M.2 NGFF (2280) or (2230) Solid State Drive and/or One M.2 NGFF (2230) Solid State Drive in the WWAN Slot on Select Models) Note: In the primary M.2 slot, the M.2 (2230) Drive uses a extender adapter bracket to accommodate for the larger M.2 (2280) slot. (Both M.2 slots support PCIe NVMe only Solid State Drives)