Bootable clones of your boot drive should be part of any serious backup scheme. These drives are invaluable if your system suddenly fails to boot, giving you troubleshooting options and even permitting you to keep working on an identical copy of your working files. While bootable copies are best made on internal SSDs and HDDs, they can also be made from USB drives. Whether external HDDs or solid-state chip storage, you can use a compatible USB drive to install macOS. Related: How to Create a macOS Bootable Installer Installing macOS on a USB Drive 1. Format… Read more