To transfer OST to PST with all mailbox items such as inbox, outbox, sent items, deleted items, drafts, contacts, appointments and calendars etc, you must apply OST to PST converter software in well manner. Under this tool you can easily convert OST to PST file with original message format-TXT, RTF and HTML in secure way. This OST converter software also migrate outlook OST file into other EML, MSG and HTML format.