Your duplicate PST emails are very large, and you can remove them without losing your data. I can suggest a good way to remove your duplicate PST emails with Sametools Remove Outlook PST Duplicate without any error. It detects your duplicate PST emails without losing your original data and removes them. This software can manage a large number of duplicate PST files without any glitches. You don't need to other application and it is eange with all Windows OS versions like 11, 10, 8.1, 8, 7, and also compatible with ANSI and UNICODE.