MailsDaddy PST Splitter tool is the best and most reliable utility to split oversized PST files efficiently without any data loss. This tool ensures high data integrity and maintains folder hierarchy. It offers multiple splitting options, including size, date, folder, or email ID. This software is compatible with Outlook 2019, 2016, 2013, and older versions. A simple interface makes it accessible to both beginners and professionals. One of its best features is that it also offers a free demo version. With this demo version, you can split the first 20 emails per folder before purchasing.

Blog: How to split large PST files