Hi, @TriCty.
I'm here to help you get past through this error and ensure you'll be able to perform a backup of your company file.
This message prompt is usually related to the program or the company file. Before performing the necessary troubleshooting steps in fixing the issue, make sure to follow the steps provided in this article first: Before You Start Troubleshooting.
If the issue persists, proceed to the rest of the solutions provided to start resolving the issue related to the program itself.
Let me know how it goes. As always, if you need assistance in going through the steps, you can reach out to our Desktop Chat Support. They'll be able to help you further using their screen share tool.