When it comes to AAA games, they really eat into your Xbox’s storage space. It’s been a while since I last checked, but I think you can have something like 6 or 7 AAA games installed at any one time. If you want to play an 8th, you’ll need to either buy an external hard drive and connect it or uninstall something.
But if you’re not planning on having many games then this shouldn’t be a problem.
(btw, this applies to any games on disks you use too - the game will still have to download something onto the console and use the disk to play)