The full path for the backup folder for me is:
If it is empty or does not exist, then no backup is created.
To create a backup:
1) Inside administration, go to services, backup
2) Click on the add button and create a new backup (no automatic backups are currently created)
3) Then after it keeps spinning, you should find new folders and files in the folder mentioned above. This is the backup.
For me it did not work at first, I had to manually create the folder and give it 777 rights (write rights) from within DSM’s file explorer.
(Right click folder, properties, rights and add user http)
If this is the case for you as well, please let us know, then it’s 2 of us having this issue and then there may be more users affected.
Please keep us posted of your progress.