Get the download OST to PST Software and easily convert OST data file to PST file format with all emails, contacts, calendars, tasks, notes, and etc. items along with attachments. It is a very simple GUI, both technical and non-technical users can easily understand the process of how can Outlook open an OST file to PST format within a few simple clicks. It supports all the latest and below versions of MS Outlook and Windows OS including Windows 11.