The basic step is to download and install GainTools NSF Converter on your system.
Browse NSF file whom you want to convert.
Get complete details of the NSF file. And, select items from NSF file that you want to convert.
The application offers 5 file formats in which you want to export NSF file. These options are PST, EML, EMLX, MSG, and MBOX formats.
Set an output location using the Browse button to save the resultant file.
In the end, hit the Convert Now button to start the conversion.
(Note: It is compulsory to install Lotus Notes in the system to export NSF files)