Who is allowed to do what within the File Management? (permissions)
Roles with the permission "May manage files" may open the new file management and see all folders there, but no files for which they are not authorised.
User groups with usage rights for a file may use it in their content, but may not edit, move or delete it.
If user groups are assigned write rights for a file, they may use, edit, move and delete this file in their content.