If you are looking for a solution to split the PST file into smaller parts, you will find many solutions on m Google, but you can not believe everything, so I suggest a tool called Shoviv PST Splitter Software. The tool provides many facilities that make it a useful tool to split PST files. Let's describe them indivisibly:

The tool allows you to select multiple PST files for split, which saves a lot of time.
It can break PST files from all of Outlook's versions.
It maintains the same data integrity as in the original files.
This handy tool has many options to split PST files (e.g., size, folder, year, or date )
A free trial is an option provided by the tool to test it out.
24*7 technical support is provided to solve any problem.