Googlebot found an extremely high number of URLs on your site

Пришло в GWT сегодня такое письмо

Googlebot found an extremely high number of URLs on your site: http://site.com/

Googlebot encountered problems while crawling your site http://site.com/. Googlebot encountered extremely large numbers of links on your site. This may indicate a problem with your site's URL structure. Googlebot may unnecessarily be crawling a large number of distinct URLs that point to identical or similar content, or crawling parts of your site that are not intended to be crawled by Googlebot. As a result Googlebot may consume much more bandwidth than necessary, or may be unable to completely index all of the content on your site. More information about this issue Here's a list of sample URLs with potential problems. However, this list may not include all problematic URLs on your site.

И ниже в письме список url на картинки, например:

http://site.com/img/nazvanie_kartinki.jpg

http://site.com/img/nazvanie_kartinki2.jpg

http://site.com/img/nazvanie_kartinki3.jpg

http://site.com/img/nazvanie_kartinki4.jpg

http://site.com/img/nazvanie_kartinki5.jpg

и так далее...

На сайте в каждом посте стоят ссылки на картинки, такого плана <a href="http://site.com/img/nazvanie_kartinki.jpg"><img src"http://site.com/img/nazvanie_kartinki.jpg"></a>

Получается что google не нравится, то что стоят ссылки на сам url картинки ?

Что можете посоветовать в данной ситуации ?

Сайт действительно большой, всего проиндексировано около 7 млн. страниц.