If you are unable to find a fast and convenient way to split the PST file, do not worry, I will provide you a complete solution here that will help you get rid of your problem. Look at this advanced KDETools Outlook PST Splitter which efficiently split large Outlook PST files into small data files as per:

Divide PST File by Size,
Divide PST File by Date,
Divide PST File by Folder
Divide PST File by Email id

This software can easily divide Archive and Password Protected PST File. It can work with many versions of MS Outlook and as well as different versions of Windows OS.