If you need to upgrade your computer hardware, simply popping in a cloned disk in the hardware may not work.
Set up one computer the way you want, clone the hard drive, and then install the clone on each subsequent computer.
When data and applications change, the backup software saves these “incremental” changes. The disk-image backup includes all boot information, applications, settings, and data and stores all of it to a local, external hard drive or the cloud.