The easiest way to split a PST file by size is to use the Softaken Split Outlook PST Software, which splits large PST files into smaller ones without sacrificing file quality. It can split large PST files into smaller ones that are the same size in MB or GB. It divides PST files of any size according to size, folder, and year. compatibility with all popular Outlook PST file formats, including Unicode (newer, larger files) and ANSI (older format). Both technical and non-technical information are easily accessible, and the interface is user-friendly. It is compatible with Outlook versions 2010, 2013, 2019, and others, as well as Windows versions 11, 10, 8.1, 8, 7, and so on.