To convert OST file to PST file, you'll need the eSoftTools OST to PST Converter software. This tool's user interface is simple and intuitive. It protects and preserves the records. It is the most efficient way to convert corrupted OST emails to PST without losing any data. It allows users to export all of the data files in a batch, including all attachments. It supports all MS Outlook versions, including Outlook 2019, 2016, and 2013, among others. This tool's free demo version can be downloaded from its official website.
For more info- Convert OST to PST files