The HP 15 Notebook 15-bw018no Comes in 3 Different Drive Options from HP and Supports Single Drive Configuration Only. (One 2.5" Solid State Drive or Hard Drive) or (One M.2 NGFF (2280) Solid State Drive using a Adapter Board) or (One eMMC Solid State Flash Drive using a Adapter Board) Note: When the M.2 (2280) Solid State Drive or the eMMC Flash Drive are Installed, they occupy the 2.5" Drive Bay using a Adapter Board. If replacing the M.2 Drive or the eMMC Flash Drive for a 2.5" Drive, you will need the 2.5" Drive bracket p/n 924980-001 and connector board p/n 924995-001 and cable p/n 924927-001 (uses same cable as M.2 Drive) for installation. If replacing the eMMC Flash Drive for a M.2 Drive, you will need the M.2 Drive bracket p/n 924981-001 and M.2 Drive board p/n 924992-001 and M.2 Drive cable p/n 924927-001 (uses same cable as Hard Drive) for installation. (The M.2 Drive board supports SATA only Solid State Drives)