I believe the XPS 8930 has mounting holes in the hard-drive cages at the bottom of the case for 2.5" drives so a 2.5" to 3.5" adapter is not needed. The hard-drive cages in the XPS 8910 do not have mounting holes for 2.5" drives. With regards to using an M.2 NVMe SSD, there is an M.2 slot on the motherboard, but it may be used for Optane memory if your system came with that memory. If the M.2 slot is empty, a PCIe adapter is not needed, just mount the NVMe drive in the slot on the motherboard.
HI, I have a Dell XPS 8930, and I want to upgrade to a SSD, but I am very much a novice, can people please recommend a 1TB SSD that I can install in my system with the least amount of headaches, Thanks, Ted
XPS 8930, upgrade to an SSD