SysInfoTools PST Split x64 - Version 3.0 Microsoft Outlook is a popular email client application of Microsoft. It is widely used to send and receive emails as well as store contact information, organize calendars and managing other data items. It uses PST file to store all the email messages and other mail items. Increasingly growth of data in PST file extends its size automatically. Due to oversized PST files the performance of MS Outlook program is affected. Other than this, the large PST files are prone to corruption. There is a size limitation in MS Outlook files: 2 GB for ANSI and 20 GB for Unicode. If this limitation increases, then the chances of corruption will also be increased. PST file corruption may result data loss forever. In such situation PST splitter software is very helpful for MS Outlook users. It allows users to split large sized PST files into multiple smaller parts without causing any damage and alteration to the original files. It words as a non-destructive application therefore, all your selected PST files will be remained intact or unchanged.