There are lots of OST to PST converter software programs available on many different platforms. So, I suggest you the most recommended OST to PST Converter Software. You can give ToolsBaer the OST to PST Conversion Software a try. This tool enables users to control data conversion. It converts OST files to PST and saves the output to a location specified by the user. It might be any suitable folder, new or old. Users of Windows 10, 8, 8.1, and 7 can easily use this app. It performs quickly on both 32- and 64-bit systems. The utility is also compatible with all upgraded versions of Microsoft Outlook, such as 2003, 2007, 2010, 2013, and others. A free version of this program is also available.