Then you need a serious external drive at least 3 to 4 times the capacity of your boot drive, format it MacOS Extended Journaled, and select it as your Time Machine drive in System Preferences > Time Machine. Your disaster recovery is booting from the Recovery Drive (code boot while holding ⌘R until you see a progress bar) then install MacOS and if necessary restore your data from Time Machine. It takes a couple of hours to complete but it is complete, and Time Machine backups are far more flexible than any bootable clone because you can recover files from months even years back easily.

Note speed isn't important with Time Machine drives so you can use inexpensive. bus powered, Hard Drives and enclosures.

Last edited by joemikeb; 10/13/20 10:01 PM. Reason: Note

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