backup your most important data
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.