Pagination for shortcode [ su_posts ]: navigation between posts

Hi.
I need to display a paging control when using the shortcode [su_posts] because I use the following parameters ([su_posts posts_per_page = “3” tax_term = “21” order = “desc”]) and I have many posts to which I can not visitor access my web.

My page is displayed now well:
https://goo.gl/iNQWTT

I need your help!

Regards

https://wordpress.org/plugins/shortcodes-ultimate/