If anyone searching the Solution of break down large PST files in MS-Outlook then I would be suggested the KDETools PST Splitter. It breaks large PST files based on your needs by date, size, year, and folder. It breaks oversized PST items with specific date ranges. Split large PST files in MS-Outlook and also Windows Version. No needs for MS-Outlook installation. Split large PST files in ANSI and also UNICODE formats. Free Version is also can be used free to download.
More Info: https://www.kdetools.com/pst-splitter/
You can use PST Split software for the same. It is a standalone software which offers 5 split options to split PST file i.e. enables to split PST file by size, year, date, folder, and email address. Each split option designed with sub-options that users can apply accordingly to get the desired output. Moreover, there is no need to worry about the data of PST file, it will remain intact and precise throughout the process. You can check the split process by downloading the free demo version that facilitates to split first 25 items free of cost.
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