NBU (Nokia Back Up) extension is used by files created with Nokia PC Suite, a software tool for created data backup copies on Nokia phones. NBU files contains a backup copy of such data as contacts, SMS messages, calendars, and many other.
NBU backup copy files are used for restoring backed-up phone data. NBU files can also be used for transferring data to a different phone.
Programs that can handle NBU files are as follows. Files with NBU suffix can be copied to any mobile device or system platform, but it may not be possible to open them properly on target system.
There can be multiple causes why you have problems with opening NBU files on given system. Fortunately, most common problems with NBU files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. The list below will guide you through the process of addressing the encountered problem.
The most common reason for such problems is the lack of proper applications that supports NBU files installed on the system. The most obvious solution is to download and install Nokia PC Suite or one to the listed programs: Noki, Nokia NbuExplorer. The full list of programs grouped by operating systems can be found above. One of the most risk-free method of downloading software is using links provided by official distributors. Visit Nokia PC Suite website and download the installer.
If you already have Nokia PC Suite installed on your systems and NBU files are still not opened properly, check if you have the latest version of the software. Sometimes software developers introduce new formats in place of that already supports along with newer versions of their applications. If you have an older version of Nokia PC Suite installed, it may not support NBU format. The most recent version of Nokia PC Suite is backward compatible and can handle file formats supported by older versions of the software.
If you have the latest version of Nokia PC Suite installed and the problem persists, select it as the default program to be used to manage NBU on your device. The method is quite simple and varies little across operating systems.
Change the default application in Windows
Change the default application in Mac OS
You closely followed the steps listed in points 1-3, but the problem is still present? You should check whether the file is a proper NBU file. Being unable to access the file can be related to various issues.
If the NBU is indeed infected, it is possible that the malware is blocking it from opening. Immediately scan the file using an antivirus tool or scan the whole system to ensure the whole system is safe. If the scanner detected that the NBU file is unsafe, proceed as instructed by the antivirus program to neutralize the threat.
Did you receive the NBU file in question from a different person? Ask him/her to send it one more time. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. If the NBU file has been downloaded from the internet only partially, try to redownload it.
Some files require elevated access rights to open them. Switch to an account that has required privileges and try opening the Nokia Phone Backup Format file again.
If the systems has insufficient resources to open NBU files, try closing all currently running applications and try again.
Latest versions of programs and drivers may help you solve problems with Nokia Phone Backup Format files and ensure security of your device and operating system. It may be the case that the NBU files work properly with updated software that addresses some system bugs.
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