This program is a fork of HDDSuperClone, which was formerly a closed-source, commercial product. The dev decided to stop supporting it and released the source code sometime last year.

This is a niche tool designed specifically for cloning/imaging failing disks for data recovery purposes. It's not intended to be a general purpose cloning tool, using it with a healthy drive would accomplish nothing more than dd. Clones are always sector-by-sector, the program doesn't interact with partitions or filesystems whatsoever.