You can easily Change.ost to.pst in Outlook 2010 with the aid of SysInspire OST to PST converter software. This software uses sophisticated algorithms to convert OST files to PST format with no data loss. It also supports all versions of Microsoft Outlook, including 2019, 2016, 2013, and others.
Know more:- https://www.sysinspire.com/ost-to-pst-converter/