Big PST file creates problems while accessing data, so better option is to split big PSDT file size by using big PST file splitter software. The software divides large Outlook files into smaller parts which you can save them at secure location. The software easily split large PST files by Date, Year, Folder and by Size. The software supports all version of MS Outlook 2000, 2003, 2007, 2010 (32 bit and 64 bit).