OST To PST File Converter - Version 3.0 OST to PST file converter utility is available as free to evaluate version that allows executing the tool for analyzing its features and quality. The free to evaluate version is fully functional excluding one restriction i.e. does not allow saving OST data into PST, MSG, DBX, or EML file. Using the free evaluation version of OST2PST tool preview of the OST data can be seen and to save the data into desired file format (PST, MSG, DBX, or EML) full version of the OST to PST file converter software must need to be purchased. The software supports all versions of Outlook Express including 6.0, 5.5, 5.0 and 4.0. OST PST convert OST files completely, buy software in full functional mode. Using it, you can easily and quickly convert OST to PST. Personal License costs you ONLY $249.