Just another user here. Now you obviously created a backup in a backup. This is usually bad. My advice is to delete the scheduled backup job, clean-up the backup directory and then create a new scheduled backup job from scratch. In the future: If you want to locate a scheduled backup, use the 3-dots menu and chose Clean/restore from there to open the Backup Manager automatically at the configured backup location.
How? By utilizing the Force backup now functionality from the 3-dots menu or by performing a Backup now?
Force backup now: Please use this function after you created a new scheduled backup job to check if a backup to the configured location is working properly and whenever you feel the need to create an additional backup in your series. Also use it after you made changes (Edit) to your scheduled backup job to check if all is still in order and as expected.
Note: It has been demonstrated in the past, that certain changes to scheduled backup jobs may lead to further backups being placed in a new sub-folder (by Roon). Bad. I don’t know if Roon Labs ever fixed that issue or if he still exists.
Backup now: Use this with caution if you already have a scheduled backup set up. Do not create those manual backups in the same location as your scheduled ones. Use the Find backups functionality to locate those manually created backups.
PS: Given the contents shown in your screenshot, I would have expected the folder at the top to have the name RoonBackups and not just Roon (the initially configured backup location in this case would then have been the folder backup):
How comes? Please make sure that you don’t interfere/change anything inside a Roon backup location.