If you want to convert NSF files to PST. I would suggest you, according to my personal knowledge, Use the professional tool DRS NSF to PST converter. The tool is capable of converting multiple Lotus Notes NSF mailboxes to PST Outlook and converts other formats such as EML, EMLX, MSG, and HTML. It supports all versions of Lotus Notes, Outlook, and Windows OS. You can download its free trial version and migrate and convert the first 50 items per folder.