Large NSF files are tricky – I had a 22GB file that Outlook wouldn’t accept using manual import methods. After some research, I tried eSoftTools NSF to PST Converter Software, and it handled it without issues. The software lets you split the PST into smaller sizes, which is super helpful for importing into Outlook safely. It also shows a preview before conversion so you can pick specific folders instead of migrating everything at once.

Read MOre - https://www.esofttools.com/nsf-to-pst-converter.html