There are many tools available that can convert MSG to PST format securely. I also recently used Softaken MSG to PST Converter and found it very useful, so you should try it. Especially when you have many files to transfer, this application makes it easier to manage and export.

Features that help make the conversion smooth:

• Supports bulk file conversion easily.
• Unlimited MSG to PST file conversion.
• 100% accurate migration with no data loss.
• Compatible with an easy-to-use interface