I think you should go with PassFixer OST to PST converters software. This tool easily solves your all OST file issues. It's come at a very manageable price and everyone can afford it. In this tool, you can get many types of file formats to convert your OST file such as HTML EMLX Yahoo, office 365, Gmail, EML, MSG ICS, MBOX, vCard, and Zimbra. It provides live previous feature, email filtering option, and bulk conversion option which can help you to convert your OST file fastly and securely. Check the free demo version of this tool from the official website of PassFixer.
Read more- Convert Outlook OST file data to PST