Easy method to convert multiple large OST files to PST without any change or losing data by downloading the most popular third-party tool of KDETools for OST to PST Converter tool. This securely export entire OST file data into Outlook PST file and various file types such as Zimbra, Gmail, PST, EMLX, NSF, HTML, MSG, vCard, MBOX, vCal, PDF, EML and etc. file types and with cloud applications such as Office365, Live Exchange Server.