Converting OST files to PST format is much easier and more efficient with third-party software compared to manual methods. However, with so many tools available, it's important to choose one that's proven in performance and backed by positive user feedback. One highly recommended option is GoldyTools Mac OST to PST Converter.

This powerful application allows you to convert multiple OST files to PST format quickly and effortlessly, without requiring any technical expertise. Its simple, step-by-step process makes it accessible to both novice and advanced users. The software is fully compatible with all versions of macOS and Windows, as well as all editions of Microsoft Outlook.

To help users explore its features, GoldyTools also offers a free demo version—perfect for evaluating its capabilities before committing to the full version.
https://www.goldytools.com/blog/easy-solution-microsoft-ost-to-pst-converter/