Unable to take backup on QuickBooks Desktop Pro
Thanks for posting on our forum.
Your backup location might be inaccessible to your software. Whether it be writing issues, disc corruption or a virus found at the location. If you are trying to backup to an external location such as a USB drive, then try remounting it.
If this doesn’t work, then the next step would be to perform a reboot of your computer.
Alternatively, try performing a full reset of your external drive by formatting it.
Be very careful while you attempt this process, as any mistake could cause you major data loss.
Hope this helped.