Extend Outlook Personal Folder - Version 2.0 Want to know how to increase the size of PST file or extend Outlook personal folder? SysTools PST Upgrade provides this opportunity to its users to increase PST file size limit. Software helps you to extend the 2GB size limit of PST file, convert ANSI PST to Unicode PST and Unicode PST to ANSI PST file. PST Upgrade tool maintain all of its email Meta information (to, cc, bcc, sent/received dates and time) intact while upgrading or converting PST files. Software allows users to convert old PST (Outlook 2000/2002/XP) to new PST (Outlook 2003/2007/2010) and new to old PST file format. You can download free demo version of the tool to convert only first three folders from Outlook PST file. But to convert all folders of PST file to ANSI or Unicode PST, you need to purchase full licensed version of the tool at just only 49 USD.