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How can you split a single large PST file?

 Modified on: April 14, 2017 |    6620 views

The size of a PST file has always been the reason for concern for most Outlook users and email administrators. Even the PST files running on Unicode format become susceptible to corruption as they grow larger. Other problems with large or oversized PSTs include slow performance. In order to address these problems, you can split your large PST file into smaller and manageable PSTs. Stellar PST File Splitter allows you to break your Outlook PST into multiple PST files based on various criterions, such as Date, Size, Mail ID, and Folder.

Steps to Split Single Large PST File

Run Stellar PST File Splitter. On the main interface, click 'Split Single File'.

On the next screen, click 'Select PST File' to browse for the PST file to be split. When you select the file, its path will be shown in the 'Select Outlook Data File (PST):' textbox. Click 'Find PST File' to locate the file if you do not its exact location.

By default, the software saves the output PST files in the same folder that contains your original PST. To specify a new location for saving these PST files, click 'Change Destination' in the same dialog. Next, click 'Split PST File'.

The next screen will show you different splitting criterion. Select 'By Date' in the 'Select Splitting option' section. The 'Option Description' section will allow you to specify the time duration for which you need your emails. After specifying these options click 'Next'.

If you choose 'By Size', you need to specify the size for smaller PST files. Multiple output PSTs will be created of the same size that you specify here. You can specify any size from 200 MB to 2 GB. After specifying the preferred size, click 'Next'.

If you select 'By Mail Id' in the 'Select Splitting option' section, click 'OK' to start scanning the PST file for all available mail ids. Once the scan is completed, the software displays a list of all the mail ids found in your PST. Select the desired mail ids in this list for which you need to extract mails and click 'OK'.

You can also choose to extract folders by selecting the 'Select & Split' option. After selecting this option, click 'OK' to initiate the scan. Once the scan is completed, a list of folders (including the root folder) in your PST will be displayed. Select the desired folders you need to extract and click 'OK'.

Once you have specified the splitting criteria, the software will start scanning the file and will break it on the specified basis.

When the process is complete, you need to provide the location for saving the log of the process.

You can access these smaller Outlook PST files by importing them into MS Outlook.


2 User Comments

How can one determine the date range of emails contained in a PST file. This info would facilitate splitting.


Robert R. Rissland



Unfortunately, there is no way to determine the date range of emails contain in the PST by using our application. Client should need to have this information.

Stellar Data Recovery


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