NSF to PST Conversion
SysInspire Free NSF to PST Converter is a fantastic and powerful utility program for repairing inaccessible NSF files. It can easily convert NSF files to PST, HTML, EMLX, EML, MSG, vCard, vCal, MBOX and CSV, and many more. All lotus notes versions are supported by this program like 10.0.1, 9.0.1, 9.0, 8.5, 8.0.2, 7.0, 6.5, and 6.0 and below versions
Here is the solution:- https://www.sysinspire.com/nsf-to-pst-converter/

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Wilsons Smith commented
Best way to convert NSF to PST, simply download NSF Exporter tool. It can easily export single or multiple NSF files data into PST, EML, EMLX, MBOX, and MSG formats. This application provides an options to convert NSF files data into PST files. It is an independent tool that doesn't require any other application to transfer NSF to PST. A free demo version of this utility to convert in which up to 10 items from each folder.
Visit here for more info: https://www.betavare.com/nsf/
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Rude Warner commented
MailsDaddy NSF to PST Converter Tool that without problems recover lotus notes NSF file and convert NSF to PST. It supports batch conversion of NSF file emails or mailboxes folders into PST, EML, EMLx, MSG, HTML, MHTML, MBOX, VCF, CSV, ICS, Office 365 & Live Exchange Server. You can select the email from lotus notes NSF file by check or un- check process and safely convert selective items of lotus emails of NSF file to PST Outlook file.