The SysInspire OST to PST Converter software is an excellent OST file conversion tool. It has a very good and simple user interface. It allows you to convert an Outlook OST file into a PST file that contains emails, contacts, draughts, Notes, Tasks, and so on. It supports a variety of file formats for converting Outlook OST files, including EML, HTML, Yahoo, Gmail, Office 365, ICS, MSG, HTML, Zimbra, vCard, and MBOX. You can also use the bulk conversion option to convert multiple OST files at once. Visit SysInspire's official website for more information.