Mighty Media Cleaner finds the image files which have not been used within a post or page and displays them for deletion from both your uploads directory and database.
Don't forget to have a proper backup of your files and database before using this plugin. You can use Backup and restore features that available in the plugin.
Two way to scan media: Auto scan (full scan) and find the usage of one specific file.
安装:
Upload mighty-media-cleaner to the /wp-content/plugins/ directory
Activate the plugin through the 'Plugins' menu in WordPress
Go to the Dashboard -> Mighty Media Cleaner and check the appropriate options