@screennamescree My Deco M4 is also (US) and im using 1.8.1 from EU website because this firmware included all regions and there is no issue to install this firmware and your backup is failed because...

@OverMyDadBody I think from V2 or V3 and later versions. But your Deco X50 support Device Isolation so you can remove Deco X20 and then Device Isolation will appeared in Deco App and then you can add...

@screennamescree What's your Deco firmware? Have u updated to 1.8.1 firmware? Have u tried to open Deco App by using 4G/5G network and then do the backup. Sometime Deco App is buggy.

@madhatter13 Ohhh that's sad 🥹

@OverMyDadBody There are many different hardware versions of Deco X20 and your hardware version is not supported.

@OverMyDadBody Because Deco X20 does'nt support Device Isolation and because of that this feature disappeared from Deco App on Deco X50 because of compatibility issues some features are disappeared.