Is it possible to sync games between two consoles that are on the same WiFi network?

You can read about network transfers at https://support.xbox.com/help/hardware-network/console/enable-network-game-transfer-xbox-one

I'm not sure if that will work between the One and the Series X though. If it does, then your games would be transferred that way. Saves are stored on the cloud and would resync when you start a game.

Hello again, actually are two situations, this is because the console has two network adapters, a wi-fi and another Ethernet, my suggestion is that try to do as many tests as possible before we can assume that it is something in the console.

If possible, try taking your console home to a friend or family member and testing the wi-fi connection and cable on another network to see if the same thing happens when trying to sync the data.

Hi

You will probably find that the network is not splitting the available bandwidth equally between the two consoles. Many things can affect this such as the WIFI strength each console has plus the affect anything else that is connected to your network will
also have.

Hi,

Unfortunatey what you are tring to do simply isn't possible. The Xbox 360 version of Call of Duty Ghosts is an entirely different game to the Xbox One version. Nothing can be synced between these two games.

They share the same name, nothing more.

Hi,

No, but on the console, if you've set your machine as the 'Home Xbox' you can use another account which can also share the Xbox Live subscription and the installed games from the main account. Then, on the PC, you can continue to use the main account and play at the same time as the person using the console.

This only works between either a console and a PC or two consoles. It's not possible to share accounts between two PCs.

https://support.xbox.com/help/hardware-network/console/my-home-xbox