I have Outlook 2007 and it works well but the .pst File is large now and I want split it up. How can I do this?
Archive your current emails in that .pst file and then create a new one.
Splitting can be done by various tools but are not really good as when time goes by one of the files could become corrupt and then you cannot assemble the files to be your .pst file.
Create a new pst file, and then move the older emails to it.
You can use Kernel for split pst file tool for the purpose for splitting your large size pst file, you can get the demo version of the software and more info from http://www.splitpstfile.net
Microsoft provides pst2gb tool. But it truncates the file rather reducing its original size. Microsoft also provides different service packs that enable Outlook to stop accepting any data after the file reaches to 2 GB. Though this prevents the file from being oversize, but you can hardly perform any mail related operations, such as to create calendars, save appointments, send or receive emails etc. Unless you remove large amount of data from or reduce its overall size, the problem continues.
You can these methods to overcome the described file oversize issue:
1-You can upgrade your ANSI formatted file to new Unicode format in Outlook 2003 or higher version.
2-If this fails, you can use pst2gb tool. But this is not a preferred method as you lose some data permanently while file truncation.
3. Use some professional tool
You got various method and solution http://exchangerecovery.hubpages.com/hub/Split-PST-File-in-an-Easiest-Way
This MS KB Article will guide you
Creates new PST files and copies there specified storage's content. Splitting is being performed while copying using size and/or year.
Dear Johan Zubeja,
To avoid corruption you must split large PST file in small manageable file.You can choose Stellar Phoenix PST File Splitter to split large file.This software works on all version of outlook product.
To know more about how to split PST file,you can follow http://www.stellaroutlooktools.com/splitter/how-to-split-pst-file.php
There's a very good article on this by Leo Notenboom here: http://ask-leo.com/what_can_i_do_about_outlooks_huge_pst.html
And a more up to date solution here: https://support.appriver.com/KB/a234/performance-problems-with-outlook-2007-and-large-pst-files.aspx