MyCloud PR4100 pro series How to MAP it OVER WAN?

Hi guys, I’m so sorry for my bad English.

First. I want to ask how to setup my MyCloud PR4100 pro series same way as MyCloud Home setting it up via WD Discovery. I would like to connect my office PR4100 and map it directly to my Computer (like a network drive) I have no problem doing it on my Mycloud Home via WD Discovery.
MyCloud Home is is my office and I connected it to my home via WD Discovery.

Please Any suggestion or Clear instruction on how to do it?

@vrachie Check in the sub-forum for your device. This sub-forum is for the WD My Cloud WDMyCloudImage