[Solved] How do I back up Google Authenticator?

Nick Asks: How do I back up Google Authenticator?
I’m starting to use Google Authenticator for more and more things now, but I’ve just realized that if I lose my phone, or if I need to wipe and restore it to install new firmware, I will lose all of my codes.

Is there anyway to back them up please? Or some kind of fallback that means I can restore it to a new device?

Thanks

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