You can Split PST Files into multiple small PST files, you can use the best Softaken Split Outlook PST Tool. This tool provides multiple options to split PST files such as split by size, folder & year PST is one of the most widely used platforms for MS Outlook for Windows. PST holds a number of databases. you can download the free trial version which splits few items from each folder. 

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If you want to split large PST files then MailsDaddy PST Split Tool can be the best solution for you. This solution is designed for both technical and non-technical users. With this software you can easily break your large PST file into small PST files without altering the original content, Using this outstanding solution users can perfectly fragment ANSI/UNICODE/Archive PST file into some small PSTs.  The utility supports all Microsoft Outlook versions 2021, 2019, 2016, 2013, 2010, 2009, 2007, 2003 and others. This tool perfectly work works with all Windows versions including Windows 11, 10, 8.1, 8, 7, XP, Vista and Windows OS.

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I must admit, the one who wrote nishtyak sprinkled.
 

If you need to divide large Outlook PST files into smaller ones, the recommended solution is to go with the reliable PST Splitter tool. This tool offers various options for splitting .pst files, including splitting by size, folder, year, etc. This software allows you to set the password to the resultant PST files to make it secure. Its simple GUI enables users to execute the splitting task without any hassle. This utility is compatible with all the PST files created on any Outlook version including 2021 and its previous versions. Moreover, to experience its capabilities, you can download the free trial version, which allows you to split a few items from each folder.