If you are looking for best software to convert OST to PST File then you can try EmailsGuru OST to PST Converter. It is specialized tool to convert OST files to PST format including emails, contacts, calendars, notes and all other items. It is capable to large size of OST file without restrictions. Moreover, it helps to recover and convert deleted or inaccessible OST files to PST format. Users can smoothly run this tool on any Windows supported platforms.

Know more- https://www.emailsguru.com/ost/pst/