You can also try the KDETools PST Splitter breaks large PST files into small parts without any damaging any data. Split PST files according to date, size, year and folder based on your needs. Split PST files in ANSI and also UNICODE formats. Support without installing of MS-Outlook. Work within all Windows and Outlook Version.
More info: https://www.kdetools.com/pst-splitter/
If you are looking for the best PST splitter then I suggest you the best Split Outlook PST Tool, which can be used to split the large PST files to a small one. This tool is very accurate and trustworthy. This tool also maintains files originality while splitting the PST file. To know more about this Split Outlook PST Tool you can download its demo version.