SYSessential OST to PST Converter is an efficient software that facilitates easy conversion of your OST files to PST format and many others, such as EML, EMLX, MSG, NSF, PDF and HTML. No matter if you wish to convert one file or thousands of OST files simultaneously, this software will easily cope with that without imposing file size limitations of any kind. With this software, you can choose specific folders such as your Inbox, Contacts, Calendar, Notes, Pictures and Journals, etc., and preserve the folder structure and all information unaltered. Moreover, you will have the ability to preview all items prior to performing the conversion and recover deleted items from the Trash. Most importantly, the conversion is carried out without having Outlook installed on your computer. The background conversion works blazingly fast on any version of Windows. Smoothly working on all Windows versions (Windows XP, Vista, 7, 8, 10, 11)