Media Library vs Server Deletion
Delete from Media Library
This removes the WordPress attachment record. References and metadata associated with that attachment may no longer resolve normally.
Delete from server
This removes the physical media file from storage. If an attachment record remains, WordPress may still show the media entry but the file will be missing.
Use carefully
Only select the deletion combination that matches your intended cleanup. For complete permanent removal, both the database attachment and physical file may need to be removed.