Google Authenticator is a TOTP client. TOTP is an open spec.
If you use a different client, you can probably find one that will let you back up codes (I'm sure Authy supports TOTP). Also note that all you need for that backup is a "seed", which is a hash. IIRC Google Authenticator uses SQLite to store its data, I bet it's not hard to get the seeds out and back them up manually.
If you use a different client, you can probably find one that will let you back up codes (I'm sure Authy supports TOTP). Also note that all you need for that backup is a "seed", which is a hash. IIRC Google Authenticator uses SQLite to store its data, I bet it's not hard to get the seeds out and back them up manually.