Splitting large PST files is important for maintaining Outlook performance and data integrity. To achieve this, consider using specialized software features. Third-party tools offer the facility to split PST files on the basis of size, folders or other criteria, streamlining data management. Smaller PST files enhance overall system responsiveness, prevent corruption risks. ToolsBaer Outlook PST Split Tool This is third party software that splits a large PST file into multiple smaller pieces. And supports Outlook 2021, 2016, 2013, 2010, 2007 and 2003. Provides 100% Security. Supports both ANSI and Unicode PST. In this you can break some files for free.