@bobdeco1 Let's start with basic understanding of what you have, which may lead to recommendations. Can you confirm that Disk C is connected to Disk B and not to Main Deco (which is Disk A in your...

@spock123 This network diagram will work. You can wire switch to Satellite Deco, and because M4 has two Ethernet ports, you can wire something else directly to the second Ethernet port, if you want...

@nyonyo If we are talking about Deco Access point mode, you can wire Deco node to any available Ethernet port you have in your home network. In my house, for example, Main Deco is connected to switch...

@nyonyo All Deco nodes can be wired to ISP router, when Deco mesh runs in Access Point mode. Main Deco must be wired to ISP modem/router. In Access Point mode Main Deco can be wired to home network,...

@nyonyo Start with this document: General questions about Ethernet Backhaul feature on your Deco

@alanginn It is possible to use powerline adapters, I tested that with my Satellite Deco M5. Not every brand of powerline adapters is compatible with Deco mesh. I would recommend TP-Link brand and...