Non Unicode to Unicode – Outlook PST converter tool is the advance utility to upgrade MS Outlook PST format from ANSI to Unicode and after upgrading Outlook PST file you can open PST files into Outlook 2003/2007 and 2010. ANSI to Unicode conversion tool helps you to convert old PST to new PST format and you can simply extend Outlook PST size limit from 2GB to 20GB PST with ease. Unicode is the newer version of Outlook personal storage folder, it poses 20GB storage capability you can store volume of data in Unicode PST files. Using PST file converter tool you can convert ANSI PST to Unicode PST, after upgrading process users easily open old PST files into Outlook 2003, 2007 and 2010 PST file format with 20GB storage space. Download trial version of SysTools PST Upgrade tool as demo version converts only first three folders of Outlook PST, purchase full version and convert complete Outlook PST into ANSI or Unicode. Full version of PST Upgrade tool is available only at 49 USD.