If you require software that Will merge your multiple PST files into one then EmailProHelp PST Merge Tool. Will be a good choice. The software will merge all your files with easy access along with all the attachments. software will merge PST files in bulk without losing any data from the resultant file. The software has more features mentioned below

• The tool will help you to remove duplicate emails while merging multiple Outlook PST files.
• Joins Outlook PST Files into a New PST and even into an Existing PST File.
• The PST Merge Software is compatible with various Windows versions.