Try CubexSoft OST to PST Converter for Mac & Windows Tool to export Outlook OST file to PST file format including all emails, contacts, calendars, and other items without any data loss. It is a very simple GUI, everyone can easily handle and manage the tool without having technical skills. During the process, the tool keeps all the folder structures without any changes and data loss. It supports various file formats such as PDF, MBOX, EML, MSG, DOC, RTF, TXT, Office 365, Gmail, G Suite, and many more. You can also try the free demo version of the tool and convert the first 25 items without any cost. It was compatible with both macOS and Windows OS including Windows 11.