The Acer Nitro 5 AN515-58 Laptop Supports up to 3 Drives. (One 2.5" Solid State Drive or Hard Drive and/or Two M.2 NGFF (2280) Solid State Drives) Note: Both M.2 slots support PCIe NVMe Gen4.0 x4 and Gen3.0 x4 Solid State Drives. If the 2.5" Drive was not installed from Acer, you will need the 2.5" Drive bracket p/n 33.QFJN2.001 and cable p/n 50.QFJN2.002 for installation.