external thumb link

Have a look at this tutorial. It includes how to add the external link on thumbs and how to activate FooGallery to use it.

https://fooplugins.com/make-wordpress-resource-links-gallery-foogallery-foogrid/

Thant’s nice, thanks a lot, but not free…

@kmarat, that functionality is built into the free FooGallery plugin and templates. The example in Adam’s link was using the FooGrid template, but you are not forced to use that.

Here is nother article explaining the process : https://fooplugins.helpscoutdocs.com/article/117-thumbnail-custom-external-links