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