Fortnite content transfer

She would just need to sign into her account on the new console. She can then redownload her games and her save progress with resync when she starts playing. If the game itself (and/or gold subscription) is tied to your account, you would need to set her
console as your Home in order to continue sharing with her. https://support.xbox.com/games/game-setup/my-home-xbox

On terms of transferring content as you speak of, you might want to actually contact with fortnite support.

Hello!

Thanks for reaching out to us here on the forums with this inquiry. I recommend contacting

Fortnite Customer Support. As far as I know there is no way to transfer content from one account to another. Hope this helps!

Hi,

As in most games, in game content is usually locked to the account that is buying it.

You could always try and contact the Fortnite team and see if they can implement your idea. Or just transfer them for you.

If the Xbox account is attached to an Epic Account (Fortnite game creator) then you may be able to unlink the current Xbox account and then relink it to your son's new account. I would check the Epic Games forums though to see if content would transfer.
You basically have to find out what Epic Account has all his Fortnite info. The previous user was correct that you cannot transfer achievements, or other game info. There may be a loophole with Fortnite and how it has a master Epic account that stores the
information.