Trying to Burn a Downloaded Xbox 360 Game Onto a Playable Dvd, What Kind of Dvd Do I Need/where Can I Get It?

The files are over 6 gigs large and I found an 9 or something like that, dvd disk but its not a straight 9 gig its more like 4.5 and then flips to 4.5 on the other side. I have no clue where to find something big enough for it that will also be interactive that will let the xbox 360 play it

Suggestion:

uh….In my research I believe that I read somewhere that a TV series disc would usually work…
if you google "how to make xbox 360 backups" it will tell you