An excellent tool to convert OST data to PST is an amazing application and a very simple solution to convert Outlook OST into PST format. It also exports the single or multiple files into PST or another format at a time. You can see the preview of the data by hitting on the Preview button and export the selected folder or items into the PST or other formats such as MSG, EML, and HTML, etc.
With this software, you can also convert the corrupted, damaged and orphaned OST file. It is capable of all Exchange, IMAP, and Hotmail OST. But the best thing is that you don’t need to pay the extra money to buy the full version of the license, you can purchase it at only $10.14 per mailbox.

More Info- http://www.a2zmigrations.com/ost-to-pst-converter/