@Caedem or you can set up some shared folders, in orddder to exchange files.

I did it following this guide: https://docs.waydro.id/faq/setting-up-a-shared-folder

The only drawback is that you have to do it every time you torn on the device.

@arubislander For me it's the same authentication failure like @danfro The GUI which comes up in your example isn't there for me. You have to enter the password in the same terminal-window where you have entered the command. (Vollaphone, UT 20.04 devel)

@Lakotaubp I was holding the power key as well. Managed to reinstall using UBports installer, works again!