How to use backup program??

So I have 3 firesticks and laptop that I would like to have the exact same configuration when I do a full reset especially with updating to the new Kodi 21.0. Is there any way that I can get the one config on all of them? When I tried to do it on another firestick it wouldnt allow me stating that there was an error but I didnt see any errors. Any help would be greatly appreciated.