Backup game question

xbox 360 downloaded game unrared has two files: .dvd and .iso apparently i’m supposed to be using the .dvd file when burning with imageburn. is my .dvd file supposed to be like 2kb small? the iso file had the size to it.
Answer #1
yes the .dvd file just conatins 2 lines of text. the laybreak info and the name of the .iso but when u slect the .dvd file to burn it actually burns the .iso file