I spent a long time trying to find the right software to divide PST files into smaller pieces, but after much searching, I found this incredibly organized and effective tool from Split PST Application, which can split PST files in seconds without any data corruption and maintains original data integrity for user safety. It can also split and transfer files in Office 365. In addition to this, you may read PST files after splitting them into smaller sizes using Microsoft Outlook 2019, 2016, 2013, 2010, 2007, 2003, and other versions. This program may be used by users of all skill levels to learn more about features and functionalities. You may split PST files with the first few PST items in each folder using the sample version, which is free to download.