MailsDaddy PST Split Tool is a user-friendly software designed to split large Outlook PST files into smaller, manageable files without losing important mailbox data. It helps reduce PST file size and can improve Outlook performance by dividing oversized PST files based on size, date, or folder. The tool maintains the original folder structure, emails, attachments, contacts, calendars, and other mailbox items during the splitting process. It is a useful solution for users who need to manage oversized PST files efficiently and avoid Outlook storage-related issues.