Microsoft Outlook used PST file to save the entire database. Here, Outlook's data tends to emails, contacts, tasks, attachments, notes, etc. But do you know that there are even two different types of PST file formats used by Microsoft Outlook. Put another way, Outlook gives an option to select one of these types while creating a new Outlook Data File.
PST File Types: ANSI & UNICODE
If you are installing older version of MS Outlook like Outlook 97/2002 then, all the data would be saved in ANSI PST file format. In contrast, user gets UNICODE PST file when they go with Outlook 2003 or later versions (Outlook 2007 and 2010). It does not mean that latest Outlook versions do not have option to generate ANSI PST File.
Actually, approximately a decade earlier, technology was not so developed as it is today and by that time Microsoft had only ANSI file character set and that was deemed efficient to handle data by its own email client application (Outlook). As time went, the demand of storage boosted up and considering this fact Microsoft introduced another character set, which is also known as UNICODE for make their PST file storage repository much bigger and stronger.
First let's catch a glimpse of some information regarding different Outlook versions and then we would directly jump on the common storages issues take place in these versions.
|SMTP||Default Port No.||Types of PST Files (By Default)||Data File Size|
|Outlook 2003||2003||ANSI & UNICODE||20GB|
|Outlook 2007||2007||ANSI & UNICODE||20GB|
|Outlook 2010||2010||ANSI & UNICODE||50GB|
|Outlook 2013||2013||ANSI & UNICODE||50GB|
|Outlook 2013||2015||ANSI & UNICODE||50GB|
Have you ever heard about 25GB PST file issue while searching on Google or going through any discussion community? Then, surely the person who posted the query is likely one of the user who is using either Outlook 97/98/2002/2002. Because, as stated above, these versions only had provision to store data in ANSI PST File and this file format has one limitation in aspect of storage size which is that it cannot store data more than 2GB. Maybe this was the reason why Microsoft approached UNICODE set frame for PST file.
Later, in order to fix 2GB PST or to split large ANSI PST File Microsoft brought a free utility named Truncation Tool, which was successful at some extent. This tool (which is still less-popular) is develop for the ANSI PST file and this tool reduces the oversized data by wiping out the overflowed data.
The later versions of Microsoft Outlook come up with potent storage capacity that is actually vary according to versions. Although, there is an option in Outlook to choose the ANSI file format in these versions too. Unlike Truncation, Microsoft did not give any free utility to deal with large size data in Outlook 2010, 2007 or 2003 in the slightest. In spite of the fact that these have huge Outlook's storage capacity, you can escape large PST file issue while working with these Outlook versions as well.
The only solution to overcome large PST File to division of large Outlook Data File into smaller parts and since Microsoft does not provide any kind of free tool to do this, eventually you have to rely on third party tool. Give a try to our software.