Amiga QB Extract recently updated
There was a HDD backup utility for the Commodore Amiga called Quarterback, part of a suite of tools called Quarterback Tools. This utility allowed you to backup existing files on your HDD, compress and/or encrypt them, and split them across multiple floppy disks.
This backup tool stores a catalog, which contains a number of directory entries at the beginning of the backup file, and then contains file markers for either compressed (CFM + 0x90) or uncompressed (FMRK) files.