Softaken Split PST Pro is a reliable and useful software that can split big Outlook PST files into smaller pieces without losing any data. It has a lot of ways to split PST files by size, year, folder or date, which makes managing them easier and more organized. It works with ANSI and Unicode PST files and all major versions of Outlook. The original data integrity is preserved including calendars, contacts, emails and attachments. Its easy-to-use interface makes it available to both beginners and experts. You do not have to install Outlook for it to work. Try out the free trial version to see what it can do before you buy the full version.