a lot of your images are supposed to be in a subdirectory named "rubbish". I only checked for one, but that was in your main directory. Before you do any work, check the file sizes. Delete any image that is more than 30 kilobytes. And use that size only for images that are the main content on a page. For any thumbnails or such, delete anything more than 3 kilobytes. Upload suitable images to replace them.