The SYSessential OST to PST Converter is one of the most effective options for safe and accurate conversion of Outlook OST files to the PST file format. Additionally, the users can even store their OST files in the MSG, EML, PDF, MBOX, HTML, and NSF formats too. Through its simple and convenient GUI support, users can perform all their conversions easily and speedily. This tool will manage the folder hierarchy, metadata, and email file formats during the conversion procedure. The tool easily migrates big OST files with its fast conversion speed. It includes all types of mailbox items from Outlook, such as e-mails, contacts, calendar items, journals, notes, tasks, and appointments. There is an Outlook data preview feature that enables the user to see a preview of mailbox data before migration. In addition, a selective exporting facility is provided, through which one can select mailbox items to be exported selectively. Multiple OST files can be converted at once without altering their quality in any way. The software does not require Outlook to be installed for its operation. This tool effectively runs on all Windows platforms.