@Adex1 If you can connect the third Deco to the second with Ethernet cable, you will not need the switch: If you can't do that, you will need the switch: Not every switch is compatible with Deco...

@Networker49 Do your run your Deco mesh in Router mode or in Access Point mode? The mode setting should be under Advanced in Deco app.

@eyeye It is possible that devices prefer WiFi6 from XE75 to WiFi5 from P7. It is also possible that what you have is just Deco app reporting issue: devices do connect to P7 but Deco app does not...

itsOmid wrote So, to confirm, the LAN ports on the Deco devices are inactive when they’re in AP mode, correct? @itsOmid This is not correct. I run Deco mesh in AP mode and I have three devices...

@itsOmid With Deco mesh running in AP mode you can connect your file server to ISP router, which you have in front of Deco mesh. This is what I do at my home: my Synology NAS is hardwired to ISP...

@PWH I would recommend Deco X50 or X55. These two Deco models are similar in appearance and performance. They should have Connection Preference feature if you buy them new (from Amazon, etc.). If...