how to export OST data into PST format, suggest me a best way?
 

Export OST to PST through brilliant OST Exporter Software, this nicely supports all corrupted OST File to export them into healthy outlook file. Through OST Export to PST Software you can export outlook OST File into PST by date filtering option “From date” to “To date” etc. It offers to makes PST File small in size upto 5GB.
more at:- Recover OST, Export OST to PST File By OST Exporter

OST to PST converter software is a simple and secure solution of the OST file errors. It is an ultimate tool for recovering and converting data of OST file into PST, HTML, RTF, and MSG formats. This converter software explicitly recovers data of OST files with sub elements such as contacts, sent/receive info, task, calendar, journal, etc. Intuitive Software is based on GFETCH technique to search for the corrupted, deleted and inaccessible OST files.

Read more:- http://www.recoverdatasoftware.com/convert-ost-to-pst/

Software to recover extract ost data and save in to outlook pst files. Software allow to save converted ost file in to such as formats PST, EML MSG, RTF, PDF, HTML and other formats.

Click for more information :- http://www.howosttopstconvert.blogspot.com

You can easily convert OST file data into PST file format by using third party OST to PST tool. The tool allows you to recover and convert inaccessible MS Outlook OST file data into Outlook PST format. It support all versions of MS Outlook including Outlook 2016 and Windows 10.For more info:- http://www.osttopst.us
Download demo version from here:- http://www.exchange.ostrecovery.org

how to export OST data into PST format, suggest me a best way?
 

The best way to convert your OST files to PST is by using manual techniques and the best part is that...these techniques are very easy to execute.
That is why I would suggest you to go for this manual procedure rather than going for a third party tool.
Do give it a look on the step by step procedure:
How To Convert OST File To PST???