The most reliable and easy method to convert OST to PST file is using
EmailsGuru OST to PST Converter. It is dedicated tool to convert OST file into PST format quickly and safely without losing data integrity. It supports batch conversion, allowing you to export multiple OST files at once. Additionally, it preserves email metadata, folder hierarchy, and attachments during the conversion process. Moreover, it is designed or developed in such a way that any novice or professional users can effortlessly convert OST file to PST. It is fully compatible with Outlook 2019, 2016, 2013 and all below versions. Moreover, it easily works with all old and new versions of Windows Operating Systems.