We have DNN Community 7.0.5. When we are trying to use the media manager in an HTML module it is taking forever to load. When trying to research this, I noticed that in the file manager, there are about 500+ folders listed that have been deleted a long time ago from the server. When we try to sync the files between the site and the server, it re-creates all of these folders on the server. How can we clean this up? I have a feeling this is why the media manager is taking so long to load.