After searching through many online OST to PST converters, I came across GoldyTools OST to PST File Converter, and I must say—it’s an excellent tool for bulk file conversion. Its features are impressive and very user-friendly.

Key Features Include:

Fast Scanning – Quickly scans and recovers corrupted or damaged OST files.

Bulk Data Handling – Efficiently converts and stores emails, contacts, calendars, notes, journals, and more.

File Format Compatibility – Supports conversion of all types of OST files into a uniform format.

Multiple Export Options – Save your converted files in various formats like EML, EMLX, PST, HTML, MSG, VCF, ICS, and others.

Flexible Conversion Modes – Choose between single file or bulk file conversion with ease.

And that’s not all—it offers many more useful features, all packed into a simple and intuitive interface. The tool is easy to use and allows you to convert files in just a few clicks.

Best of all, a free trial version is available, so users can explore its capabilities before making a purchase.
https://www.goldytools.com/blog/maintain-folder-structure-ost-file-conversion/