How to Convert OST Data into PST file format? There is no manual process that can help converting OST data into personal storage table format. Hence, a well recognized application called DataBaton OST to PST Converter can be brought in usage to make it work as an OST to PST converter. The demo version of OST to PST converter can be used to preview all converted items but it restricts to export and save data to PST file format on local disk.