To convert OST files to PST format, I would like to suggest a perfect solution that will help you with an effortless recovery and conversion. Users don't need any technical knowledge for executing this. Use the smart DRS OST to PST converter
tool which allows users to recover their corrupt OST file and can save Outlook OST to PST, EML, MSG, MBOX, PDF, CSV, Gmail, Yahoo, etc. The GUI of this tool is user-friendly and easy to use.