Backing up other users' data on Mac

[winwin]

From one user's account on Mac OS (Monteray in this case) is it possible to backup all User folder data, including other users, using FFSync? I am receiving permission errors when I try, but is there a work around or do all complete User folder backups need to happen from within the Admin account? Or, do I need to log into each user account and run FFSync from inside each separately?

[xCSxXenon]

Of course, the permissions are there to prevent other users from accessing your data.
You can either run FFS from each account for backups or run FFS using sudo from a terminal.