I am getting a notification that there is a new firmware version. When trying to update from the app it says firmware failed. When trying to do it from the web it says file is too large. Help

When I am connecting my modem to the 2.5gb port on the deco and run a speed test I am getting under 1gb download. My internet speeds are 1.5gb. Is this port not actually 2.5gb? When using the 5Gb port

Is there any way to force a device to connect to a specific deco? In my home office I have a TP-Link RE450 extending the Deco's WiFi network, but it always seems to connect to the deco furthest away f