Don't pay $800 for Apple's 2TB SSD upgrade
jeffgeerling.com
jeffgeerling.com
But these days, when it comes to external bootable drives, Apple vacillates between neglect and hostility.
I've lost track of the current status of bootable backups on the Mac. Based on the following blog, it seems there's some new insult to the process once or twice a year: https://eclecticlight.co