You can eliminate duplicate PST files easily without any software with SameTools PST Duplicate Remover. The software scans your PST files and quickly removes duplicate copies without harming the original data. It is enough to handle very large duplicate PST files without needing any additional software or third-party support. It works smoothly with all the Windows operating systems, including 11, 10, 8.1, 8, and 7. This software is best for non-techies, so they can always test it with a free trial before they make up their mind about the complete version.