Change OST File to PST File - Version 3.01 How to change OST file to PST file? Exchange OST file contains most crucial information which can easily effected with little term of corruption. To solve this corruption consequence you need to try OST converter software that can easily repair damage OST file and change OST file to PST file format. This software change OST file to PST file with entire components like email, contacts, calendars, journal, task etc. Software support entire version of Exchange server and MS Outlook. Try free demo version of software which easily change 5 OST file items to PST file formats. After using free demo version if you need to change complete OST file components then you need to buy full version which is available at $99 only.