The HP EliteDesk 800 G9 Mini has one M.2 slot, so the SATA bay fills the gap
No second M.2 slot — the single M.2 slot handles an NVMe drive, and the 2.5-inch SATA bay adds extra capacity alongside it.
No second M.2 slot — the single M.2 slot handles an NVMe drive, and the 2.5-inch SATA bay adds extra capacity alongside it.