How do I skip downloading BF4 to my Xbox 360?

Hi anyone reading this.

I recently pre-ordered BF4 from Gamestop and I brought it home and put it in my Xbox. I was greeted with a message saying, "A content installation that will ensure optimal quality and gameplay is required to play Battlefield 4. This requires an Xbox 360 Hard Drive and 2GB of free space." Is there any way to skip this, or should I buy a internal hard drive? I have a 4GB Xbox 360, with no hard drive. Can I download it to my Xbox 360 memory unit or not?

Thanks in advance.

-Triptych