The Lenovo ThinkPad L570 Laptop Comes in 2 Different Drive Options from Lenovo and Supports Single and Dual Drive Configurations. (One M.2 NGFF (2280) Solid State Drive in a Adapter Bracket and/or One M.2 NGFF (2242) Solid State Drive in the WWAN Slot) or (One 2.5" Solid State Drive or Hard Drive and/or One M.2 NGFF (2242) Solid State Drive in WWAN Slot) Note: The M.2 (2280) Drive and the 2.5" Drive are installed in the same location using different drive caddys. The M.2 (2280) Drive is installed in a adapter bracket p/n 01AY477 and then is installed in the 2.5" Drive caddy.