Preparing for MFA reset


I am a relatively new user of Home Assistant and HAOS

I have MFA setup using Google Auth and it’s working fine. However I am concerned about having only one MFA option, in case I lose my phone etc

What secondary MFA source would people recommend, such as email?

In the worst case, the MFA documentation says:
You can disable the Notify MFA module by editing or removing the file [your_config_dir]/.storage/auth_module.notify.

How would you do this on an HAOS installation without logging in to HA? What do I need to do now to prepare for this eventuality?