how to backup

Ive posted a few times on how to backup games. Ive even posted what program Im using and my burner but no one care to reply. Im guessing some of you guys are to good enough for the world.

Ok so I want to back up my nfl2k1 but when i look at the files i got some text and a warning .da file.

Help me out on how to burn this please
Im using a nero prog. and a hp cdwriter plus burner

reply back to reafe_808********com
For some reason I cant read anyones post so please email me.

Thanks