The HP 240 G9 Notebook Comes in 2 Different Storage Configurations from HP and Supports Single or Dual Drive Configurations. (Models Equipped with a Intel Pentium N6000 or Celeron N5100/N4500 Support: One 2.5" Solid State Drive or Hard Drive and/or One M.2 NGFF (2280) Solid State Drive Installed on the System Board) or (Models Equipped with a Intel Celeron N4500 with 64GB a eMMC Flash Drive Support: One 2.5" Solid State Drive or Hard Drive and/or One 64GB eMMC Solid State Flash Drive) Note: Models that have the 64GB eMMC Flash Drive do not have a M.2 slot on the system board. The eMMC Flash Drive is integrated on the system board and is not upgradable. If the 2.5" Drive was not Installed from HP, you will need the 2.5" Drive bracket p/n L24490-001 and cable p/n L23187-001 for installation. (The M.2 slot on the system board supports PCIe NVMe Solid State Drives)