If you want to convert a Lotus Notes NSF file to a PST file for free, use this SysInspire Free NSF to PST Converter Software. New users will get a free preview of this tool to see how it works. You can convert NSF files with up to 25 things per mailbox to each file format for free in the demo. Until converting NSF to PST files, you can open and view the NSF files.
Also, get the solution to fix Lotus Notes RRV Bucket Error