I find that if I delete the products form the backend admin, abantecart doesn't delete the related records in table resource_library, resource_map, resource_descriptions and the related photos.
Hope that abantecart team can develop a separate module which can delete the records in the above tables and remove the photos from the server harddisk. It takes time to delete the photos from server. So that a separate module is better to do this job.
Thank you!