If you see a page entitled “No File History was found” here instead, click Configure File History settings before proceeding.
You may need to select your external hard drive’s name from the “On a hard disk” drop-down box
Once the backup finishes, you’ll be prompted to create a repair disk. You can do this by clicking Yes, inserting a blank DVD into your computer, and following the on-screen instructions. A repair disk will allow you to recover your computer if it malfunctions.
If your hard drive uses a USB 3. 0 connection and your Mac doesn’t have USB 3. 0 ports, you’ll need to buy and use a USB-C to USB 3. 0 adapter. If you haven’t yet formatted your hard drive to erase it and set it up for a MacOS backup, format it before continuing.
This process may take several hours. If you get a “Restoration Failed” error, turn off FileVault and try again.