The Acer Extensa EX214-51G Laptop Supports Single and Dual Drive Configurations. (One 2.5" Solid State Drive or Hard Drive and/or One M.2 NGFF (2280) Solid State Drive) Note: If the 2.5" Drive was not installed from Acer, you will need the 2.5" Drive bracket and cable for installation. The M.2 slot on the system board supports Generation 3.0 x4 NVMe Drives. If installing a Generation 4.0 x4 NVMe Drive, the drive will run at Generation 3.0 x4 speeds.