When it was working properly, the backup file was in the Quickbooks Backup File Format (,qbb). Now it it is leaving a temporary file that doesn't work.

When it was working properly, the file was saved to a Quickbooks Company Backup fole format (.qbb)

I am having the exact same problem. However, I have tried all of the fixes below and none of them worked. In addition, I am backing up Quickbooks to an external...