CD needing obtain???

My brother very not too long ago received an xbox collection X for his birthday and we've received him star wars battlefront 2 for him as an xbox disk sport.

Asking as somebody who's had a Nintendo change, how come that you might want to now obtain the sport to the xbox????

I believed that having the disk meant the sport was on there and also you wouldn't have to take up your Xbox's storage. That's just about the way it's labored with some other consoles just like the change I swear.