The HP ProBook 430 G6 Notebook Comes in Different Storage Configurations and Supports Either 1 or 2 Drives Depending on the System Board Installed. (Single and Dual Drive Options with a 8th Gen Intel Core i3/i5/i7 or Pentium 5405U Processor: One 2.5" Drive and/or One M.2 NGFF (2280) Solid State Drive) or (Single Drive Options with a Intel Celeron 4205U Processor: One 2.5" Drive or One M.2 NGFF (2280) SATA Solid State Drive using a M.2 Drive Bracket) Note: When the M.2 (2280) Drive is installed in models with a Intel Celeron 4205U Processor, the M.2 Drive occupies the 2.5" Drive bay by using a M.2 Drive bracket. If replacing the M.2 Drive for a 2.5" Drive in models with a Intel Celeron 4205U Processor, or adding a 2.5" Drive to models with a 8th Gen Intel Core i3/i5/i7 or Pentium 5405U Processor, you will need the 2.5" Drive hardware kit p/n L44510-001 (Includes: 2.5" Drive cover and cable) for installation. (Models with a 8th Gen Intel Core i3/i5/i7 or Pentium 5405U Processor support M.2 SATA and PCIe NVMe Solid State Drives. Models with a Intel Celeron 4205U support M.2 SATA only Solid State Drives in a adapter bracket)