Files with nbu extension can also be found as firmware updates for NetBiter webSCADA software.
There is one other file type using
the NBU file extension!
.nbu - Nokia PC Suite 6.82+ backup
NBU file extension - NetBiter webSCADA firmware update
What is nbu file? How to open nbu files?
File type specification:
The nbu file extension is associated with NetBiter. The NetBiter webSCADA acts as a web interface to one or more Modbus RTU devices. All configuration, monitoring and control is done by built-in web pages that updates dynamically.
This type of .nbu file contains firmware update for NetBiter. These files are not related to Nokia backup files.