So that file size was 1.88 GB or something like that. The installing stopped at like 5% to 10%. It stopped showing how much Mb/s and it wouldn't continue. So I clicked on pause installation, and it said it got paused. I clicked on continue installing... but still, nothing changed. It didn't show up Mb/s again. So after doing this like two or three times, I decided to completely cancel the update. I must have fked up something because the whole game, 45.76 GB got somehow completely uninstalled. I only clicked to cancel installing... but why? Did this happen to anyone else on Xbox? Or am I the only one? 45.76 GB is a long time for me. I'm just gonna have to leave my Xbox on standby and go do something else...
TLDR - Do not cancel update installing. No matter what. Or you will delete the whole game.