Minds and Characters backup

Too often, characters I’ve created have been deleted—and lately, this has happened with "minds" as well—because the page crashed and my browser cache became corrupted.

I know that minds can be published and saved to the cloud, but if I create a mind for my own exclusive use, I can't publish it, meaning the only existing version is the one in the browser cache.

That is why I believe there should be a simple way to create local backups for both characters and minds.