Unfortunately the drives in the enclosure are 3.5. I do have a spare SATA spot in each of the 7040s but you can only fit 1 SATA drive in the 3040s and no m2 drives. That’s why I am trying to decide whether it would be better to sacrifice a SATA port on one of the 7040s for (hopefully) better speeds and stability or use USB and put an extra drive in each of the 7040s