Here is one more thing I do. Before attempting anything new that might cause problems with the tablet, I will put the most current backup in the download folder of internal memory. Then, if anything goes wrong and for some reason I can't access the SD card or cannot connect to the PC via the USB port, then I can go to TWRP and restore the tablet from internal memory. It is just a failsafe procedure. And, I will always backup before adding any new apps. If the apps work then I will back up again so I have a restore with the new apps added.
One can never have too many backups.