If you want to convert your ost file into pst file then I would suggest an easy yet powerful Software to for convert OST files into PST format. Use this OST to PST Converter, This software provides you multiple options to create single PST file from multiple OST files keeping the folder structure intact.  this OST to PST converter software enable user to convert ost file to pst file. With the help of this utility you can open inaccessible ost file into outlook email client. It takes few minutes to convert emails.The software supports all the ms outlook versions like- 2019, 2016, 2013, 2010 and 2007 and below versions. It is compatible with all Windows OS. All users both technical or non technical can easily use this tool without any technical skill because there no technical skill required rather basic computer knowledge is enough to access this tool. Its has user friendly interface and it provide free demo version which allow the users to see the preview of recoverable data.