RedSVO

Is it documented anywhere what file my Halo 4 campaign and other data is saved to? I'm trying to back it/them up in case of corruption, etc. I find three files in the Halo 4 folder on my Xbox, two with the filename "RedSVO", created a day apart, and another named "Halo Save Data". Perhaps it's logical to think that the Halo Save Data is THE file, but what are the other two used for? (I think the subheading for these two files reference save data, unsure at the moment). Would really like to know. hanks in advance!