@rammiz I have Deco M9 Plus at my house. I think you may not have full understanding of the TP-Link Deco mesh concept. Let's start with it. Every Deco M9 Plus is same hardware. There is no dedicated...

@PeasenGuin.1991 Start with this TP-Link Deco FAQ: General questions about Ethernet Backhaul feature on your Deco

@Pierwitch If you can connect two devices such as PCs wirelessly to your Main Deco, and start file transfer between them - you should expect to see faster speeds. Anything at your home network that...

@Pierwitch How many Deco E4 units do you have? If more than one, do Satellite Deco use WiFi to connect to Main Deco, or you wired them with Ethernet cable? Deco E4 hardware specifications:

@Pierwitch Deco E4 has 100 Mbps Ethernet ports. As long as you keep E4 as Main Deco, 90 Mbps is the fastest speed you can get.

@Kabnine Not every brand of WiFi mesh allows to configure how satellite nodes connect. That was the reason for initial pushback from TP-Link Deco development team: "Nobody does it, so why should we?"...