If you have large numbers of PST files and want to combine them then try this advanced KDETools PST Merge tool. This software is easy to use and download, PST Merge software support to both files types ANSI and UNICODE. This software can remove duplicates PST files while merging the batch PST files. PST Merge software has advanced featured no file size limitation and free to use. The best thing is that you can merge multiple contacts and calenders of PST files into single PST.