QuickBooks is an application that records the finances of an entity whereas the company file which is created in QuickBooks is in .qbw file extension stored locally on your computer. Users trying to open the qbw file are required to take the backup of their latest company file which will be in .qbb file format. The qbb file is a format of the QuickBooks Backup file.
QuickBooks Backup file can be created inside QuickBooks if a user wants to create a backup of QuickBooks company file. The user trying to open qbb file without QuickBooks is the one who want to import their qbw or qbb files into MS Excel or Office spreadsheet.
Open Excel > Go to File > Click on Import > Locate the .qbb file you want to open
QuickBooks backup files can be corrupted or cannot be imported, the cause may vary it can be either because of the version of QuickBooks or any internal damage in the QuickBooks Company file. If you encounter any trouble while importing the files please contact QuickBooks technical support+1888-300-6790.