The best methods to OST files to PST format with attachments is EmailsGuru OST to PST Converter. It is designed or developed in such a way that both technical and non-technical users can utilize this tool. This tool comes with wide range of features like batch conversion, simple interface, splitting large OST file to multiple PST files, capability to convert corrupted or inaccessible OST files and many more. It is fully supportable to all versions of Outlook and Windows Operating Systems. Any new users can use a free trial version to convert 25 OST files to PST.