It is unlikely you can convert old Nokia backup files between individual formats from different versions of Nokia PC Suite. What you can do though is to recover/extract the data and work with these as you need. Tools like Noki would be ideal choice for such recovery, but no nfb to nbu conversion is possible.
Home > Search converters: nfb to nbu
Conversion of nfb file format to nbu file format beta
Search for nfb to nbu converter or software able to handle these file types.
Convert Nokia PC Suite phone backup to Nokia PC Suite 6.82+ backup.
We have found 2 software records in our database eligible for .nfb to .nbu file format conversion.
Microsoft Windows software 
- convert nfb to nbu on Windows
Noki
A small usefull program for exploring and extracting of files created with Nokia PC suite
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from nfb file | No | No | No | No | No | Yes | Yes | No |
to nbu file | No | Yes | No | No | No | No | No | Yes |
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned nfb to nbu. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Nokia NbuExplorer
A free explorer for Nokia NBU files
Additional links: Open nfb file, Open nbu file
NFB
Files with nfb suffix can be usually found as older backups of Nokia phone made using Nokia PC Suite. Latest versions use nbu files instead.
NBU
Files with nbu extension can be usually found as old Nokia phone backups made using Nokia PC Suite 6.82 and higher.
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