I got to look at the box last night. The hub, which is all USB 2.0 ports, is connected to the AM6’s sole OTG port (blue rather than black). Might that be USB 3.0 or was it 2.1? Box was purchased around 10 or 11 years ago.
I just ordered a replacement powered hub with all ports being 3.0. I really should have considered upgrading to a NAS. Old habits die hard…