If you want to convert your OST file to CSV, the Sysinfo OST to PST Converter makes it easy. Just open the tool, add your OST file, and preview your emails and other data. Choose CSV from the list of file types, and apply filters if needed. Pick a folder to save your file, then click Convert. That’s it; your OST data will now be in a CSV file that you can open in Excel or other spreadsheet programs.
Read more: https://www.sysinfotools.com/ost-to-pst-converter.php