The easiest way to convert OST to PST file format is by using the Goldytools OST to PST Converter. This powerful tool allows you to effortlessly convert a large number of OST files into PST format without requiring any technical expertise. It ensures a seamless conversion process, with no data left behind. The application runs efficiently on Windows 10, 8, 8.1, and 7, and supports both 32-bit and 64-bit systems. Additionally, it is compatible with all versions of MS Outlook, including 2003, 2007, 2010, 2013, and later. The Goldytools converter also offers a free version, allowing users to try the software before making a purchase.