Question on the the disks and HDD Space

So from what I’ve been gathering there are two disks and each is 4GB worth of content. (total of 8GB)That’s not my question but I thought I’d add it to confirm

Now my actual question is that I’ve seen and read some things on the forums that suggest of you download war games onto your HDD then you will be able to play it from the Campaign disk and there is no need for swapping. Is this true?

That’s how I understand it.

Pretty sure you have to install war games other wise you cant play it, and it is 8gigs just for that.