I created a media source called “Medien” to grant a limited access to the file system for specific backend users. After that, I created a backend user. This user has limited backend permissions (via ACL settings). This user is a content editor and shall only have access to the media source named “Medien”.
How can I now hide the “Filesystem” from the left pane underneath “Dateien” (Files) but keep the “Medien” accessible?