You can easily convert data from MBOX to PST file format in large volume by EmailsGuru MBOX to PST Converter. It is dedicated tool to convert MBOX files to PST format including emails, contacts, calendars, notes and all other items. The software kept intact all email formatting and hierarchy throughout the conversion process. It is completely professional tool to convert MBOX file to PST format in large volume. 

For more info- Convert MBOX to PST in Large Volume