Save all edited files or save a backup

I would like to have the option to make automatic saves or to save all edited files with a click.
Further or as an alternative I would be nice if edited files, which aren’t saved yet get an automatic backup. I mean something like a restore mode. I don’t want to lose edits, when I run out of battery or so.


Right now there isn’t even an indicator to show that a file has been changed but not yet saved, which seems critical.

In VScode, command-opt-s saves all open files. Something similar would be nice here.