Large NSF files often cause issues with manual migration methods, but tools like eSoftTools NSF to PST Converter are built to handle them efficiently. The software supports large-sized NSF files without corruption or data loss.
Another useful feature is split PST option. If your NSF file converts into a very large PST, you can divide it into smaller, more manageable PST files. This prevents Outlook from slowing down and keeps your mailbox organized.