Agreed, I have an extra phone for gmail authenticator backup, also make sure to secure a pin code, you can use a paper or something and store in properly.
Yeah I agree with you ,,aside from that the best backup at all is you can wrote at your personal notebook like diary to make sure you will not loses because ink is sharping than mind on other hand if your back up is in your pc having a comprehensive backup scheme in place doesn't only protect you against the trauma of accidentally deleting your files. It also gives you a safety net if a virus hits your PC, hackers hold your information hostage, or your kids tip a glass of water over your MacBook. After an error like this, backups might be your only option for retrieving your files, so you shouldn't delay putting a system in place.