After upgrading to Big Sur, my iPhone sync settings do not save properly in Finder. Specifically, the Backup option will not save to "Back up all the data on your iPhone to this Mac". If I select that option, click Apply, it will revert back to "Back up your most important data on your iPhone to iCloud". I do not want to use iCLoud backup, I had backups to my Mac working perfectly on Catalina.
I had been having the same problem and finally saw the solution in the Community. The setting was stuck in my phone. I had chosen not to back up to iCloud but saw the same behavior you did. I chose the iCloud option instead, restarted my phone. Then chose the Mac option and restarted again. Voila! When I backed up the option did NOT switch back to iCloud. Now if I could just figure out why my backup is stuck in reading photos for four hours... I'd be happy.
I had been having the same problem and finally saw the solution in the Community. The setting was stuck in my phone. I had chosen not to back up to iCloud but saw the same behavior you did. I chose the iCloud option instead, restarted my phone. Then chose the Mac option and restarted again. Voila! When I backed up the option did NOT switch back to iCloud. Now if I could just figure out why my backup is stuck in reading photos for four hours... I'd be happy.
Thanks for the suggestion, will try it soon! By “Mac option” are you referring to the setting on the Mac in Finder or is that in iOS settings? Did you change any of the backup settings in Finder or was this all done on your iPhone?
On the iPhone do you need to stop using the iCloud backup option ?? Then the Backup option to computer will stick ?? Guessing as do not backup iPhone to computer and never have. Personal choice.
I don't have iCloud backups enabled on my iPhone.
backup your most important data
