If you are new users and wants solution of how to convert OST files to PST format easily then you can use professionals recommended OST to PST Recovery software. Which comes with user-friendly interface and many advanced features so that users can efficiently convert single or multiple OST files to PST format without any extra efforts. The software is capable to convert large size OST file to PST format. It is fully supportable to MS Outlook 2019, 2016, 2013 and all below versions.

For more info- https://www.zooksoftware.com/ost-to-pst/