Can't connect from a remote location

I can connect to my WD EX2 using win10 and on various ipads on my internal wifi network. But when I try to connect from another location say my buddy’s house down the road on his wifi network its a no go. Is it possible or did I assume too much with this product?

Hello,

Check page # 21 of the user’s manual. Hope it helps.

No luck with your pdf.
Thanks for the suggestion.

JP