Free OST to PST Converter Software

If you need to export your Outlook OST file to PST, consider using the ATS Free OST to PST converter. This software is known for its speed, security, and reliability in converting various Outlook mailbox items, including emails, contacts, calendar entries, journal tasks, drafts, notes, deleted items, and attachments. The demo version offers users the ability to convert OST files to PST and multiple other formats such as MBOX, EML, MSG, etc. Additionally, it supports migration to cloud servers like Office 365, Live Exchange Server, and Google Mails.
It's important to note that while the demo version provides these features, it comes with limitations, allowing the conversion of only 30 emails per folder.