Nero backitup program

does anyone know how to adjust the burn speeds of this program

I’ve not used Nero’s BackItUp, as I use another program to backup my data to DVD, but when I burn images to CD-R from Nero, before it burns the media, it will let you access a drop-down menu of speeds under the burner you’re using. So, after you’ve selected the type of job, specified the folders to back up, it should let you specify the burn speed before starting to burn the back up.