If you split a PST file into multiple PST files, it helps enhance manageability, reduces the chances of PST file corruption, and increases Outlook performance. For this, you can take the help of the best utility named Sysinfo PST Split Tool which helps you to split your PST file into multiple PST files. Furthermore, you can enter the size of the resultant split PST file. Also, you can set a password in the new PST files.