[dnanian]

OK, no.

A container is kind of like a "bucket" that holds space that is allocated to volumes. If you look in Disk Utility and choose View > Show All Devices, you'll see the container listed below the drive hardware and above the volumes already there.

SuperDuper will automatically handle the "split" between Data and System volumes. You just create, for example, "My Backup", point us at it, and we'll do the rest.

If you want to store other files on the drive, you would create an additional volume (or volumes) by selecting a volume in the container (eg "My Backup"), pressing "+" in the Disk Utility toolbar, and entering a name.

That volume would share the space in the container, but would be separate - like a partition, but much more flexible, since it only takes up as much space as it has data.