Here's How to Backup QuickBooks Desktop. Switch to single-user in QuickBooks by going to the File menu. Return to File, hover over Back up Company, and choose to Create Local Backup. Select Local Backup in the window, then click Next.
Pick Browse in the Local Backup Only area to choose where to save your backup company file. Before you save, this performs a test to ensure the integrity of your backup file. Select OK when you're ready then choose Save it now and Next. A confirmation message is sent to you after it is done.