Flexslider with Link - using Flexslider Field Collection
Just found it:

my Slider-Field-Collection ("field_slide") has: 

[Label] -[Field Type] - [Widget]
Title- Text - Text field
Body - Long text - Text area
Image - Image - Media file selector
link - Link - Link


Display settings:

[Field] - [Format]
Image - Image Link Formater - Settings: Link image to: link (field_link)


in my content type I use that "field_slide" (embedded) and on display settings: Flexslider

This makes it easy to create content and add unlimited images (as slides) without creating each slide as a node.