Outlook PST Upgrade tool to increase Outlook PST mailbox size or convert Outlook PST 2GB to 20GB in hassle-free manner. If your PST file has been exceeded from 2GB then your Outlook display a message that you have exceed from the require limit of Outlook PST file so you need to delete some emails from your inbox. But if do not want to delete your crucial emails from Outlook PST files then you must pick our manageable and non-destructive PST Conversion Tool that helps you to increase Outlook mailbox size and convert Outlook PST file from ANSI or Unicode PST as well as Unicode to ANSI PST file format. You can export Outlook PST files from ANSI PST (2000/2002/XP) to Unicode PST (2003/2007) and vice versa. To evaluate the efficiency of the tool you need to download free trial version of PST Upgrade. But with the using of trial version you can convert only first 3 folders from Outlook PST files. But if you want to convert all folders of PST, then get full licensed of the tool at just only 49 USD.