If you looking at the solution for split the oversized Outlook PST file then you can try MailsDaddy PST Split Tool. It easily adds multiple large PST files at a time and breaks to multiple small PST files. It can provide four options to split the PST data -by date, by size, by folder, and by id. The user can choose an option by his need. It easily performs with all editions of Windows OS.
The demo version of the tool is available on the official site that allows you to split the Outlook PST file.
Visit: Outlook PST Split Tool