PST Split Tool - Version 3.01 Large size of PST file creates trouble in working of the Outlook like slow processing and many more. So, the way out is to split PST file into small files so that it's working can be improved. Split PST Tool is an exact solution to your problem. Split PST Tool suggests an unbeatable way to split PST file. PST file can be split in 6 different sizes: 256 MB, 512MB, 1GB, 2GB, 3GB& 4GB. User can select any size as mentioned to Split PST File. As in ANSI the maximum limit of size was 2GB but in UNICODE its 25GB, so split PST file as you want. How to split PST file? Now the question arises is how to split PST file? We can split PST file in 3 different categories:1. Split PST by Size.2. Split PST by Date.3. Split PST by Year.User can select any of the above option to Split PST