I never thought about this question, but I did not see the answer. How are Google Authenticator backups made?
I don’t think that there is a way to go about it if you haven´t written the backup codes at the moment of registration. I mean you can go to each site that you’ve already got on the are Google Authenticator, disable 2FA and add it again (with care). This should give you backup codes on a site by site basis (originated on the site itself, not Google Authenticator), although in the past I found some to be a pain since they were buggy and simply disabling and re-enabling has issues on some sites protected by 2FA.
Authy is much more seamless with the backups. To try it out, I installed Authy on another device (preserving my first device), and giving my credential I reinstalled all my active 2FA account tokens on the other device from the cloud backup. I now have the same set of tokens operative on two devices. Try that with Google Authenticator.
Thank you very much for the detailed response, of course this is important. I have a lot of accounts connected to 2FA, the whole process will take 1-2 hours, but I will do it.
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