The best way to split a large Outlook PST file is by using the Regain Outlook PST Splitter Tool. It is a powerful software that provides three flexible splitting options: splitting by size, date, or sorting emails by sender, recipient, or subject. It keeps all critical email details, including attachments, timestamps, and headers, so the data remains intact throughout the process. The tool supports UNICODE and ANSI formats and works easily with all the versions of MS Outlook and Windows. With this easy-to-use interface, the Regain PST Splitter can easily manage big PST files speedily, with safety, and cost-effectively.