back-up

So before trying to update to (High) Sierra from El Capitan, I CCC'd my startup disk (named "MainDrive") to an external drive (plus I have a Timemachine running internally on a separate drive). Though, I wanted to check if the backup was bootable - I did install/update Clover to the harddrive...

After many hours of tinkering, I've finally got my build working well and I was wondering if anyone had any advice for backing things up. In the past, installing things or working with Clover Configurator has really messed things up, so moving forward - I'm going to work on getting iMessage...