To divide large Outlook PST files safely, you can try the MacSonik PST Splitter Tool . This software is designed to split oversized PST files into smaller sections without any data loss. Users can split PST files by size, date, sender, or folders according to their needs. The tool maintains complete data integrity, including attachments and folder structure, during the entire splitting process. It supports all Outlook and Mac versions, making it a reliable solution for managing large mailbox files. Additionally, its user-friendly interface makes the process simple for all types of users.