The Lenovo E41-55 Win 11 Laptop Supports Single and Dual Drive Configurations. (One 2.5" Solid State Drive or Hard Drive and/or One M.2 NGFF (2242) Solid State Drive) Note: If the 2.5" Drive was not installed from Lenovo, you will need the 2.5" Drive caddy p/n 5B41B01412 for installation.