Convert OST to PST 5.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This tool was originally designed by GSTech OST to PST Converter. We recommend checking the downloaded files with any free antivirus. The program lies within System Utilities, more precisely Archivers.
From the developer:
Offline Storage Table means OST is an offline file in Microsoft Outlook. Through this OST, user become able to work offline and changes gets visual when next time it gets connected with Exchange Server. So here we are discussing about how to convert OST file due to the corruption of OST. Yes users, GSTECH OST to PST Export Program Helps you especially when your OST database got lost/corrupted or vanished by any reason.
You may want to check out more software, such as Best OST To PST Converter, Software Imperial OST to PST Converter or OST To PST Converter, which might be related to Convert OST to PST.