When a PST file becomes too large, Outlook may slow down or stop responding. The MSOutlookHelp PST Splitter Tool offers an easy way to manage oversized PST files. It helps users split PST file without Outlook, so there is no need to depend on Outlook installation. The tool allows splitting PST files based on size, making smaller and manageable PST parts. It supports both ANSI and Unicode PST formats, ensuring compatibility with old and new Outlook data while keeping the original folder structure intact.