I have just setup a Deco M5 system to my plusnet router (soon to be changed to BT). I have the main M5 connected to the router via Lan cable and the wifi on the plusnet router turned off. 

Everything seems to be working fine, however I have a WD Mycloudex2ultra Nas drive connected to a Ethernet Hub via Lan. 

Ive tested the Nas and can access it via the Mycloud app on my phone (at home and away from it) and using Plex around the house.

However i cannot use plex when not at home and I cannot access the nas via file explorer's, when both on the network and away. Ive tried both Android and Windows systems to access the mapped drives I had access to previously. 

I want to be able to keep the Deco's so I can use parental controls so would prefer not to use them in access point mode

Any Ideas Thanks?