For exporting Lotus Notes NSF files to PST format, you can try Regain NSF File Converter. This professional tool efficiently converts all Lotus Notes data, including emails, tasks, contacts, and calendars, into multiple formats such as PST, MBOX, EML, MSG, EMLX, vCard, and PDF. It supports large NSF files (up to 50 GB) and enables migration to Office 365, Gmail, Yahoo, and GoDaddy email clients. The software also allows excluding specific folders, removing duplicate emails, splitting large PST files, and previewing mailbox content before conversion, making it ideal for bulk NSF to PST conversion while maintaining folder hierarchy.