Is the M.2 slot (#16 on motherboard) already occupied? To use the PCI-e x4 slot (#24) with any NVME SSD, you're going to need a PCI-e x4 > NVME adapter card. If BIOS is set to RAID now, you need to change that to AHCI (assuming you have both options in BIOS) before installing that card. So check that setting first, but do not change it. If it's set to RAID, you have to do this the right way or Windows will become unbootable. Now you can install the x4>NVME adapter with SSD installed on it. The x4 adapter and SSD will probably need their own drivers installed. And you will need to format the SSD before you can use it for routine storage or backup.
My Inspiron 5680 has Dell Inc. 0PXWHK (U3E1) motherboard. My PCIe 3.0 x4 slot is open, will I be able to use a Samsung - 970 EVO Plus 2TB PCIe Gen 3 x4 NVMe on this board? Thanks!
Samsung 970 Evo Plus on Dell Inc. 0PXWHK (U3E1)