If you ever wanted to know how to access our android phone files from terminal, without using any third party app and just with a USB cable and GNome, here is how:
We need to check the GNOME Virtual file system (gfvs) to see it is available.
run the following command:
You will get an Media Transfer Protocol (mtp), for more about this, check this link: MTP
Now use it as it would be any other directory on your system
Done, you can access your phone directory and do whaterver you want.