I want to suggest you eSoftTools OST to PST converter software because this software is very advanced and cool. It gives you multiple types of features that help you to convert your OST file fastly. It also converts Outlook OST file into PST and many other formats such as EML, EMLX, HTML, vCard, ICS, MSG, Zimbra, MBOX, Office 365, Gmail, and Yahoo. Download the free demo version of this tool from the official website of eSoftTools.
Read more- Convert your OST file
if you search any ost to pst converter software and not find any ost to pst converter software try stella ost to pst converter software to convert all ost mailbox items in to pst file this software is convert all 32bit and 64bit ost file this software is convert all ost mailbox items using some simple steps. This software is convert all corrupted and unmounted ost mailbox items in to pst file. for more info visit this link https://www.stelladatarecovery.com/ost-to-pst-converter.html