If you're seeking for a free way to convert OST to PST files, I advise using eSoftTools OST to PST Converter Software. This software is the one that converts OST files to PST files the fastest at the moment. Users can restore significant data from corrupted Ost files with this tool. There are only a few simple stages involved in the OST conversion process. This tool is very easy to use and completely safe for all users.