Hi,

notice that the exclusions filters for images are separated for each different data source. Thus if you want to remove the 'media' folder you have to remove it from all data source settings. If you have content pages holding images from the media folder, the data source 'content' should have removed this filter.

If this is already setup in this way, probably there is some other reason why the images sitemap doesn't contain images from contents. For example, if the sitemap is large ensure that all links are crawled using precaching. If not using the precaching the images sitemap is limited by the configuration parameter to crawl only 50 links, to avoid common server timeouts.

John