The Lenovo ThinkBook 15p G2 ITH Laptop Supports Single and Dual Drive Configurations. (Two M.2 NGFF (2280) or (2242) Solid State Drives) Note: There are two M.2 slots on the system board and both slots support M.2 2280 and M.2 2242 Drives by moving the SSD standoff bracket p/n 5B40S21996 to accommodate the form factor. M.2 slot-1 (SSD1) supports PCIe Generation 4.0 x4 speeds and slot-2 (SSD2) supports PCIe Generation 3.0 x 4 speeds.