Checked your Patreon and noted this:
"And no, my internet connection isn't strong enough to save it in the cloud store"
I'm pretty sure that you have broadband connection and it's always strong enough for that if you do it right. What you should do is take the backups at night after you have finished drawing for the day, leave the computer open for the night and the backup is ready when you wake up. Repeat that at least once in a week. I recommend to use MEGA, it's safe, fast and easy to use.