Hi there, @ThatsNoMoon.

I suggest contacting our QuickBooks Desktop Support since you get the same result. They can help investigate why you're still unable to back up your company file.

Here's how:

1. Press F1 to open the Help window.
2. Click Contact us at the bottom part.
3. Give a brief description of your issue, create a backup file and click Continue.
4. Choose from Message an Agent or Talk to a Specialist.

For additional information on how to contact our Support, you can refer to this article: Contact the QuickBooks Desktop Customer Support Team.

Please let me know if you have other questions related to QuickBooks. I'm always here to help you.