Finding the best PST splitter software depends on your needs and how you want to deal with large Outlook files. GainTools Split PST Software is one of the best tools to split oversized PST files by size, year or folder without changing mailbox structure. Plus, It also supports ANSI and Unicode PST files and gives a simple way to organize Outlook data into smaller files.

If you’re dealing with PST management problems and have a large file, splitting it can help you keep Outlook data more manageable. Before you use the full version for your mailbox needs, you can use the free trial version.