Large PST Split - Version 2.1 Split large PST files into smaller parts with our large split PST software, if you have made all the efforts to maintain the PST files of any size. As large PST files are the headache for any kind of users who are using Outlook 2003 or Outlook 2007 versions. So at some or the other time they need to split large PST file size and protect the PST file data from corruption. How to Split large PST files in Outlook is no more a hassle for the users whether they need to split large PST file Outlook 2003 or split large PST file Outlook 2007. As the PST file grows up it becomes difficult for you to manage the size of PST file then you can split the size into smaller sections. This will make it easy for you to maintain the data file more smartly and if your PST file size is ANSI then every time your PST file size grows you can split it to prevent the file corruption.It is not necessary that you need to split large PST