Call of duty base game is 446.8 gb for me and i have xbox ss that have less than 360 gb why ?

you need to go into manage and uncheck the things that you don't want to use. this will reduce the total install size

^ It's not just that. Microsoft define units for information in base 2 rather than base 10 in their operating systems.

Typically:

1 GB = 1 Gigabyte = 1,000,000,000 bytes

Microsoft use:

1 GB = 1 Gibibyte = 1,073,741,824 bytes

This is why HDD spaces show you a total capacity less than you expect. For example on my PC, Windows says my 1 TB HDD is 931 GB because it's using GB as Gibibyte not Gigabyte.

Hi,

I purchased Call of Duty Modern Warfare 2. I have an Xbox 360 which I purchase in 2017 that has a hard drive with 207 GB free

Hello "PEW PEW PEW xD"

If you're looking for a bigger HDD (500 GBs bigger) and you don't mind playing Call Of Duty Advanced Warfare; go with this one.

However, if Call Of Duty Advanced Warfare isn't your thing and you don't mind playing Sunset Overdrive (with 500 GBs less); then I would go with this one

Have a nice day or afternoon or night

If it's only showing Caldera, then it sound slike you downloaded the free Warzone rather than purchasing the campaign?

This is the Xbox page for the campaign (which includes Warzone):

https://www.xbox.com/en-GB/games/store/call-of-duty-modern-warfare-digital-standard-edition/