I can imagine how important it is to receive timely and effective support when you need it, @Titan92557. I'll share some information about backing up data files in QuickBooks Desktop.
It appears from the error message that you don't have access to the path where you want to save the backup file. With this, I suggest reaching out to another user who possesses the required access permissions for the specified path to successfully save the file.
You can utilize this article for more information about the process: Back up your QuickBooks Desktop company file.
Moreover, I'm adding this guide to know what to do if you encounter data damage on your company file: Fix data damage on your QuickBooks Desktop company file.
For more questions about backing up files in QuickBooks, let me know be leaving your reply below. I'll be willing to answer them for you.
