Increase "Split By" size limit
Currently you can only split a document by file size by a value between 0.5 and 50MB. Can this be increased to support file sizes such as 250MB?

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simer sam commented
The split PST program can able to split PST files according to the size. If a PST file is oversized, you can use the application. It splits PST by GB or MB. Choose the required size by entering the size manually.The PST Split program is a highly compatible application that users can operate to split PST files created in any MS Outlook versions. The app supports the older MS Outlook 2003 and the latest MS Outlook 2019 versions to split PST files. Because of its great compatibility, the tool gives the desired conversion results. Supported Versions- MS Outlook 2003, MS Outlook 2007, MS Outlook 2010, MS Outlook 2013, MS Outlook 2016, MS Outlook 2019 .
Follow this link :- https://www.osttopstapp.com/split-pst.html