I just get my Archer C3150, i used to have and archer C8.
I bought an Orico 2 HDD Enclosure with USB C 3.0, to use with the C8, that way was possible to use both HDD on my network, that worked just fine.
But, at this C3150 it seems not working so great. It can see only one HDD not the other one.
What I Tried:
Conect the Orico at my pc to see with everthing was ok. It was
Still at my computer, i Changed the HDD position, still ok.
In the C3150:
Tried both USB 3.0 and 2.1 same result.
If i disconect one that is showing at the router, it starts to see the other one.
I hope i could give enought clues,
anyway I'm here for more needed explanation.