Are you looking for a solution to save offline data files as Outlook? Use a professional OST File Converter software to bulk save offline data files as Outlook PST file format including all emails, contacts, calendars, tasks, and other items along with attachments. There is no file size limitations, one can export a large size of OST files into PST file format without any data loss. It supports simple GUI, everyone can easily handle and work with this software without any help. This software can batch save offline data files as Outlook PST file format without using Outlook application. It was compatible with both Mac OS and Windows OS including Windows 11. You can also use the free demo version of the software.