vMail OST to PST Converter will very efficiently recover and convert OST files into Outlook PST file format. This tool also converts other formats file such as EML, EMLX, MBOX, MSG, vCal, vCard etc. This tool supports all the latest versions of Windows such as 2007, 2010, and 2013, 2016, 2019, etc. You can try the free demo version so that you can convert 30 emails for free.
Get more info- https://www.vsoftware.org/blog/how-to-split-ost-file.html