Split Outlook Large PST files Quickly

Eliminate 'Outlook PST File Has Reached its Maximum Size' Error

Are you Getting 'Outlook PST file has reached its maximum size' error?

Is your Outlook application showing strange behavior?

Microsoft till now has released and introduced several versions of Outlook, the latest being 2010 with every new release an upgrade over its predecessors. Earlier versions of Outlook such as 98, 2002 and 2003 used to come inbuilt with a size limit of 2GB that creates oversized PST issues every now and then, the error mentioned here being one of the symptoms. Yes, Outlook PST File Has Reached its Maximum Size error happens mostly in all the older versions. Many users still using 2002 etc. are likely to face such an error most often.

From accessing anything such as emails from Inbox to sending or receiving mails, if your PST file is outsized, you will face the error like this:

'Filename.pst has reached its maximum size. To reduce the amount of data in this file, select some items that you no longer need, then permanently (shift + del) delete them.'


As said before, this error is associated with the older versions due to the small inbuilt storage capacity of 2GB only. In such a scenario, if this issue is overlooked, perhaps you could face these very ramifications:

  • Outlook won't allow any edit, modifications or alterations to a file
  • Also, you could face mailing issues
  • You could lose access to most of the Outlook items and settings
  • Worse, the file could even go corrupt.

Get Outlook PST File Has Reached its Maximum Size fixed!

As you can see, you get the first solution from the error itself. If you have a oversized PST file, you need to delete the duplicate and needless items from it as quickly as possible. Nevertheless, before attempting to delete the files, it is necessary to have a backup of that particular file. Now that you have backed up all data, you can do the following:

  • Create new pst files and copy some data from the oversized one into them, all you need is to drag and drop the items one by one.
  • Needless items in that pst should be deleted
  • Always clean up 'Deleted Items Folder'
  • You can also compact the PST file

Or as an alternative, if you face this oversized problem again and again, it would be better to switch from a older Outlook to a new version like 2007 or 2010.

If the Outlook PST File Has Reached its Maximum Size error still annoys you even after doing these measures, try the inbuilt utility called pst2gb.exe in Outlook to split PST file. However, if the file is too large, this tool fails to handle such. Therefore, it would be wise to download third party PST splitter tool to split the file and reduce its file size back to normal without any data loss. This further would help in eradicating the error as well.