Can't play a game between 2 different profiles.

Hi JcoJo

Sorry to hear about that, however, you brother just need to ensure that the console is his home Xbox by:

-Sign in to his profile

-Go to Settings > General > Personalization > My Home Xbox > Set it as my Home Xbox

-Then switch to your profile

If you already did that, then you may need to re-sync your account into the console by:

Ensure that you know your Microsoft account and password before doing so and your console is connected to the internet.

-Press the Xbox button on your controller to open the guide.

-Profile & System > Settings > Account > Remove account

-Select the account that you want to remove, and then select "Remove" to confirm.

-Once done, select Close.

Then, you can restart your console > long-press Xbox button on the controller > Restart

Lastly, sign in to your account again by:

-Press the Xbox button to open the guide.

-Go to Sign in > Add new

Of course the 2 systems are not going to play together in anyway. Why would they. While the game might be the same BF4, COD, Madden etc the games are very different. Different servers, different hardware, different OS's. Nothing is the same between them.
Same with the PS4 and PS3. You can't game between them.

well 2 things

first you can delete your profile on your hd but your account is forever online and cannot be deleted

2nd nothing can be transfered between accounts

downloads will remain on your hd and can be used if it was the purchasing console

if not you will have to do a drm transfer

if you delete the downloads you need to relogin into the purchasing account to redownload them

You can swap your Mass Effect saves to your LIVE profile by being signed in with it and then simply selecting them in the game's folder and copying them to the same location but be aware you wont be able to get achievements while using them.

Though you'll have to do the final fight again in order to recreate the 'hidden' save which is use to import into Mass Effect 2.

However Mass Effect 2 is a different animal and you can't swap the saves between profiles.

So you'll have to play the final fight against Saren in the first game and play through Mass Effect 2 with that import if you want that Shepard in the final game.

Hi dojo969. If it's not an Xbox Play Anywhere title you can't install it twice between console and PC. It's a different game. Sorry.