SYSessential OST to PST Converter is the best solution to easily convert your inaccessible OST files to PST, PDF, EML, HTML, and MBOX file formats. Whether it's for personal or corporate purposes, it will allow you to migrate thousands of OST files simultaneously without any interruption to your computer. You will be able to pick specific folders, browse through your files using the tree view option, and extract lost messages from the Recycle Bin. It will process your conversion request up to 100 times faster than any other solution while maintaining your original format and folder hierarchy. You only need to follow a few simple steps to convert your OST files to PST formats. Initially, you can select your OST file, review all your items, set your desired destination, and begin your conversion. Even better, you won’t require an active Exchange Server or Outlook to install on your computer, and it will run smoothly on all versions of Windows (7, 8, 10, and 11).