The Acer Extensa EX215-21 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: The M.2 slot supports PCIe NVMe Solid State Drives. If the 2.5" Drive was not installed from Acer, you will need the 2.5" Drive bracket and cable for installation. (Supports TPM OPAL Encrypted Solid State Drives)