It is really, really not advised to safe a backup only locally. It is like don't doing a backup at all... And trust me, we all know what we're talking about. But I trust in you, that you at least download a backup to your local machine (eg. your laptop).
That being said, and not to sound to much like a teacher, have you taken a look at the above linked Add-on from @sabeechen? 
It allows for the automated backup and optionally an upload to GoogleDrive.
Trust me, this Add-on is what you want. Setup a password and it is even ok-ish to upload it to Google. If someone does the effort to encrypt your password protected HA config, it is more likely that that person or organization has already other things hacked from you. Assuming you used a strong password...
Seriously, check out the Add-on, it is the de facto standard for automated backups in HA, and it is very well maintained! 
This one here: