Notes about the SQB file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The SQB file type is primarily associated with 'SQL Backup' by Red Gate Software Ltd.. SQL Backup is a tool for creating, compressing and protecting your SQL Server backups. This is a custom backup format. A converter is available with the program to convert the SQB file to a Microsoft Tape Format (MTF) file so it can be imported back into SQL Server.