Free Export OST to PST in Outlook - Version 4.0 Program to export OST to PST extension is proficient for all Outlook users whether they use any version. OST to PST exporter provides advance recovery option for deep scanning of offline storage file. For the users who want to check export OST to PST software working prior to its purchase can run the application demo version. Users with poor technical knowledge can also run the exporting OST file application trial version previews the recovered OST data but they are restricted to save the recovered data.