If you need to convert OST files to PST format then you can make use of most remarkable ZOOK OST to PST Converter tool. It quickly convert OST files to PST including emails, contacts, notes, attachments, tasks, etc. The software does not need MS Outlook Exchange Server to convert OST to PST. It is a professional utility with user-friendly interface. Users can convert particular mailbox item without alteration of data. Users can also download free demo version to checked out accuracy of the software and convert 25 emails from each folders for free.