If you want to get the best solution to split large PST files into small PST files then I would suggest the KDETools PST Splitter.
Split large PST files based on Date.
Break PST files based on Size.
Truncate large PST files based on Year.
Cut large PST files based on Folder.
Split large PST files without any files size restriction.
Easily breaks PST files in all Version of Windows and Outlook.
Support both Version in ANSI and also UNICODE formats.
Free Version also available.
More Info: https://www.kdetools.com/pst-splitter/
If you want to break large the PST items in small parts, Here I recommend you try the Split PST Tool that can easily split large PST items according to date, year, size and folder option without installing MS-Outlook in your system. It split both ANSI and UNICODE formats. It supports all windows and Outlook versions.
Visit here for more info: https://www.osttopstapp.com/split-pst.html
If you desire to split pst file into smaller parts online then the pst split tool Microsoft gives you the suppleness to pick a under attack PST file from local folders or sub-folders to take out the file division process. Its application is supportive in keep away from such instances by splitting into a convenient PST file. Using the easy Unicode PST file you can follow the strategy. This application provides multiple options to divide an oversized PST file. You can also use demo version of this software. you can download this software from here:- https://download.cnet.com/KDETools-PST-Splitter/3000-2369_4-78050036.html