Chad, thank you again for your great support.
My powered USB 3.0hub is a high quality one.
I have three items connected to it:
1. ZWO guide camera (asi185mc)
2. ZWO imaging camera (asi1600mc-c)
3. Optec TCF-Si focuser via serial to USB 2.0 adapter cable.
The cable(s) connecting the hub to the Mac Mini are 18 feet long (for now), so I will be purchasing an active USB 3.0 cable.
The images will only be passed to the computer and it's external drive (1TB SSD), by that Active cable.
Hopefully that should minimize any problems transferring the images to the storage SSD.
I wwill post here how it all comes out.
Fivel