The easiest method to divide large PST files in Outlook is by using the Regain PST Splitter Tool. This tool offers a simple, user-friendly interface and allows you to split large PST files with just a few clicks. You can choose to split files by size, date range, or even by sorting emails based on sender, recipient, or subject. It ensures that all email details, including attachments and timestamps, are preserved. The tool works with both UNICODE and ANSI formats, and it’s compatible with all versions of Outlook, making it a reliable and efficient solution for managing oversized PST files.