The HP 14 Notebook 14t-df0000 -CTO- (Pentium or Celeron Processor) 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 Bracket) or (One eMMC Solid State Flash Drive on Motherboard) Note: When the M.2 (2280) Drive is installed, the M.2 Drive occupies the 2.5" Drive bay using a adapter bracket. If replacing the M.2 Drive for a 2.5" Drive, you will need the 2.5" Drive bracket p/n L24490-001 and cable p/n L23187-001 for installation. If replacing the 2.5" Drive for a M.2 Drive, you will need the M.2 Drive bracket p/n L24488-001 and drive board p/n L24487-001 for installation. The eMMC Flash Storage Drives are integrated on the system board and are not upgradable. (The M.2 Drive board supports SATA only Solid State Drives)