Hi Randall,
1. For permission issue for DB13 jobs, execute sapdba_role.sql (This file will be in kernel directory)
This will fix the issue.
2. For Changing the backup location. copy your Init<SID>.sap file and rename Ex: (Init<SID>.sap.disk)
Mention the desired backup location for the parameter: backup_root_dir.
In DB13 you can use this profile while scheduling the backup.
Regards/Gouda