BQB

I've used ImgBurn to make backup and archive disks, but I'm not having much luck saving files to my hard drive rather than a disk. What I'm trying to do is save the audiobooks I get from the library to a thumb drive for use in my vehicles, and I thought I could use ImgBurn to save the audiofiles on my hard drive. I thought that was an option I could select, but if so, I sure can't find it. Is that something I can do with ImgBurn or did I just imagine it?