The best tool for splitting huge PST files in Outlook is the Regain PST file Splitter Tool. This user-friendly tool enhances Outlook performance by dividing large PST files into smaller, more manageable chunks. You can customize the split to meet your needs by dividing files by size, date period, sender, recipient, or subject. In order to preserve the integrity of your emails, the tool makes sure that all crucial information is kept safe, including timestamps, attachments, and email headers. All versions of Windows OS and Microsoft Outlook are compatible with it, and it supports both ANSI and UNICODE formats. Regain PST Splitter’s intuitive interface simplifies and expedites the management of huge email files.