I used this adapter:

https://www.amazon.com/gp/product/B085DJLDBC/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

...bought it at Amazon. ABLEWE 3-Port USB 3.0 Hub with RJ45 10/100/1000 Gigabit Ethernet Adapter.

And the cable is Monoprice Cat6A Ethernet Patch Cable - 7 Feet - White | Network Internet Cord - RJ45, 550Mhz, STP, Pure Bare Copper Wire, 10G, 26AWG, also from Amazon: https://www.amazon.com/gp/product/B077H45T2F/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

I did not turn off the wifi when I plugged in the cable the last time, I tried this ...but I did attempt that the time before (and didnt appear to help).

Thanks for your good questions and help...