I am administering a wallpaper website. It hasn't got much content. Pictures mainly and at the moment my sitemap has 1700 entries that includes all the pages ( download pages for single items also ). do you think having that many pages in your sitemap is a good practice and won't hurt my SEO? Or should I keep just the main pages in my sitemap? ( main category pages that list all the pages to the respective download page of an image) That brings down the number of of page in sitemap to 28 pages.