With these "trial" deals and once-every-four year HDD/SSD swap out I didn’t really have to pay for Superduper but I'm a happy customer so I did. I tried Carbon Copy Cloner first, and granted I bumped the USB a few times and re-started the dupe, but theirs FAILED to make a bootable backup. Urgh. As I’m you know when you’re dealing with a “mid 2012” MacBook moving 600gb takes over SATA takes 8 hours over USB 2.0 (I replaced a 1TB HDD with a 1TB SSD), so if it fails you have to START OVER, a heavy price to pay. Superduper just worked, first time, and if your dealing with this “Catalina” (Apple just.keeps.changing.everything) you have two choices (CCC and Superduper) basically. Great, great product, reasonably priced and does what it says it does, period. This was overall (including the CCC failure) a 24-hour project (typing this into a mid-2012 MacBook Pro that is actually usable and pretty fast now)... If anyone cares used a Crucial MX500 SSD 1TB, don't forget the SATA cable (!) Woohoo!