GL.iNet GL-MT3000 (Beryl AX) - USB hub

Can I use a USB hub to: a) tether with my iPhone, and b) use an SSD at the same time?
I assume the USB needs to be powered separately.
I prefer not to tether via wifi.
I want to use the SSD for storing Apple Music songs.
Thanks.

It’s okay to do that

Great. Thanks a lot.