Reader v20 Hyperlinks Security Hyperlink warning check box NOT remembering "Remember this Action "

[#1]

Using a LibreOffice I created an .odt with hyperlinks to files to be located on an SD card.

I need the user an easy way to jump to supporting video, photo and PDFs located on that drive.  

I have exported the .odt as a PDF.   The only files that do not throw up the security warnings are the PDFs. Video and photos  get the pop ups:

Reader DC v20 throws up the security warning and then annoyingly an other pop up after you click allow.

Why doesnt the check box work?

I can live with one pop up but not two.  I have  tried going to preferences and selecting Trust Manager  >change settings button> select  "allow pdfs to access all website"

I can click on the same link immediately after, withotu closing anythig and the same pop up occurs.

I understand that the Fille/// hyperlink  may be the reason for the prompts but do not think I can change it in Reader.  

How can we get the check box to work so they only get the warning ONE time?   

[#2]

What happens if you disable Protected View or Protected Mode at startup?

In Edit--->>> Preferences--->>> Security Enhanced, have you enabled "Automatically Trust sites from my Windows OS security zones"?

[#3]

Disabling "Protected Mode at Start up" eliminates the  second popup

The Security popup  shown in the  first post still appears and the check box does not do anything.

 I can click allow  , open the file   and go back to the same hyperlink without closing the file and it will still put the pop up . It is not remembering  this action .  The only thought would be the check box is not for all types of links since it states  "Remember this action for this site..."   I am not linking to a web url so I wonder if that is why?

"Autromatically Trust sites on my Windows OS security zones" was already selected