Merge PST files with the free software that combines PST files into a single PST file. Merge all items from PST files, such as, Inboxes, Calendars, Contacts, Journals, Tasks etc. to another PST. Combine data from files created in different Outlook versions. The original PST files will remain intact while PST files are merged into a new file. Merge, move or copy specified PST folders from multiple PST files at once using PST Merger Pro Edition.