If you're looking for the most effective software to split PST files, then the EmailProHelp PST Splitter tool is the optimal solution. This tool is designed to facilitate the division of large or oversized Outlook PST files into smaller segments. Additionally, it offers a feature that lets you eliminate duplicate items during the splitting process. The tool contains more features they are:-

• You will be able to divide and break PST Files of any size based on Size, Folder, Date, or Sender's Email ID.
• Full compatibility with PST files from all versions of Outlook, including Outlook 2019 and Office 365.
• The PST Splitter has a user-friendly interface, ensuring a hassle-free experience while splitting PST files.