If you are a technical person and you have a small number of NSF files, you can check the manual method, but it is a complex and time-consuming method.
If you are looking for a fast and efficient way to convert NSF file to PST format, then you should check Bitacube Lotus Notes to Outlook Converter.
For More Detail: https://www.bitacube.com/nsf-to-pst-converter.html

thank ypu