How to Break Large PST File into Smaller Parts

In this discussion, we have suggested possible for splitting large PST file into several small PST files. The methods are universally applicable to all versions of Outlook 2019, 2016, 2013, 2010, and 2007 mailboxes. Microsoft Outlook is an email client application. It has different types of files including contacts, tasks, notes, email messages, journals, etc. All these items are stored in PST (Personal Storage Table). When the size of the PST file increases the file size limit, it could push you towards unfavorable situations of data loss and broken data items.

Why we Need Splitting Large PST File?

• Due to the large size of the PST file, the speed of MS Outlook starts to slow down.

• Users have stored data items to the folders of the PST file if the PST file is out of space or it is left with very limited storage space.

• Users are unmanaged the data due to Oversized PST files.

Best Technique to Breaks large PST Files without Outlook:

There are various Software that are available in the market, but the one that is recommended trusted by IT experts for PST Split procedure conveniently is KDETools PST Splitter. This is the best solution for splitting PST files with 100% accuracy and without losing any original data loss. It can be easily used to breaks the large PST files into smaller parts such as emails, contacts, calendars, tasks, etc.

Steps to Split the large PST Files:

  1. Download the PST Splitter Software and install.
splitting large PST file
  • Select on Open button and browse PST files.
Browse PST File
  • Then users can easily check the folder structure in the left panel.
Preview of NSF File Contents
  • Then users can select the desired location to save split PST files.
Save Desired Location For Split PST Option
  • Click on checkbox to split PST File by size and you can easily customize it.
Split Option for NPST File
  • Now, Message Split option to select a particular date to split data items.
Message Filtering Option for Split PST File
  • Users can easily select the Message Filter Option to select a certain option.
Split PST File
  • Now click on the Start Split button to start the splitting process.
Start Split button


As we discuss, the techniques to split oversized PST files in MS Outlook that cross permissible storage limits or that are about to reach maximum storage size limits. Therefore, we have mentioned explaining the method to split the large PST files in Outlook and Windows Version.

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Article Author Details

Harry Brown