Hi, I've read their the entire disk copy help to no avail... they seem to want to help you for making a new CD from files, but not from backing one up. Here is my question... What is exactly is the difference between the "Compression" option and the "DVD/CD Mastering" option, specifically when you're backing up a CD from device. I've been able to find after much searching on the internet that DVD/CD Mastering saves it in ISO 9660 format, but what exactly does compression do? To confuse me even more, I backed up my jaguar discs via compression and burned them.... they worked perfectly for an install. I was also uncertain about the encryption... does it let you set a password and encrypts the disc?