Download the best software name is vMail OST to PST Converter to export Outlook OST to file to PST.
Users can also save the converted OST file in a variety of formats, including vCard, MBOX, HTML, EML, EMLX, Office365, and so on. You can also use this software to recover data that has been deleted. Hopefully, this information will help you in fixing the issue.
This software includes a superb and updated user-friendly interface that makes it quick and simple to use. Download the free trial sample version to discover how to convert an OST file to PST Outlook data.
Know more info- https://www.vsoftware.org/ost-to-pst-converter.html