Ever wonder how you are going to back up your emails and profiles in Mozilla Thunderbird? Mozilla does not have an "official" add-on for Thunderbird that do automated backup.
But there is one that I found on the internet that can do the same and I have been using for years now.
The add-on is called "ImportExportTools". You can download the add-on on this link: https://addons.thunderbird.net/en-US/thunderbird/addon/importexporttools/
All you have to do is install the add-on (requires restart) and then the add-on takes care of the rest.
You can access the add-on by going to the "Tools" menu and then find "ImportExportTools".
The add-on has the ability to schedule the frequency of backup you can set it to make a backup after 1 day, 3 days, 7 days, 15 day and 30 days (I use one day interval). The add-on is free to use.