Superlative Exchange OST to PST converter program perfect solution to convert OST to Outlook PST. Exchange OST to PST Converter tool is finest software to converts Outlook OST to PST file format. Through this software you can gracefully extracts all Outlook mailbox folders- Inbox, Outbox, Sent Items etc. With the help of this software you can save big OST data file into Outlook PST with 1GB to 5GB sizes.