This can happen with both digital and disc-based games.
Note Installing from a disc does not apply to the Xbox One S All-Digital Edition, which doesn’t include an optical disc drive.
Solution 1: Check to see if the game is updating
You can see this message if you try to start a game while it’s being updated. To check if that’s happening:
If the game isn’t updating, do the following.
Solution 2: Restart your console
Note If your Xbox is frozen, press and hold the console’s power button for 10 seconds. After the console shuts down, restart it.
If the game isn’t updating and you get the message again after restarting your Xbox, do one of the following.
Solution 3: Reset your Xbox while keeping your games
As an alternative to resetting your Xbox, you could delete and reinstall your game. Depending on the size of the game, this could take longer than resetting.
Solution 4: Delete and reinstall the game
Would you like to contact Support regarding the "Error 0x80270300 occurs when you try to start, install, or update a game on Xbox One" issue you were reading about or a different issue?