I want to recommend you eSoftTools NSF to PST Converter tool. It’s an outstanding tool for NSF file conversion. I am a happy user of this tool. Its converts NSF file to PST and many other formats such as EML, EMLX, Office 365, HTML, ICS, VCF, MBOX, CSV, Gmail, Yahoo, MSG, and Zimbra. The main highlight of this tool is the bulk conversion option that helps you to convert multiple NSF at the same time. Try the demo version of this tool from the official website of eSoftTools.