Hello Jordy,
Media Cleaner is a very useful plugin! Recently stumbled upon it and it has helped clean up orphaned media gallery database entries. The ‘File not found’ issue column correctly listed all files that were manually deleted from the server’s file system.
Have a few ideas for enhancements.
1. Make the Issue column sortable. So that when clicked it grouped all issues by name.
2. Allow certain issues to be automatically ignored, or only search for certain issues.
3. We use SiteOrigin’s Visual Page Builder and images entered in a post via the SiteOrigin Image widget appear as “Seems not be in use” in the issue column. Looking at the image gallery, all images used with this widget are not associated with a post, so there might not be an easy fix for this.
4. Allow images in a certain directory to be deleted from the file system and from the media gallery database. More info on this below.
We extensively use a form plugin called Visual Form Builder Pro and every image uploaded via a form is automatically entered in the WordPress image gallery. While this is useful for some forms, other forms (like a contact-us form) do not need the images in the WP database or on the server. Periodically I FTP into the uploads/vfb folder and clear out the images so our hard drive doesn’t hit capacity. This then leaves an orphan entry in the database for the image.