Tips to Break up Large PST File to Smaller Files That You Absolutely Can’t Miss!

Raj Kumar ~ Modified: September 10th, 2022 ~ Outlook ~ 8 Minutes Reading

This procedure is explained for the users who are annoyed due to the huge size of their Outlook data file resulting in the depletion of performance of the Microsoft Outlook. Oversized Outlook PST file slows down the system performance and makes it hard to avoid PST corruption. Split PST file into smaller parts is needed to avoid the corruption in future. So it is better to break up large PST file of Outlook 2019, 2016, 2013, 2010, and 2007 through the manual solution or the recommended professional solution.

We know that, many users are looking for an efficient solution on how to split PST file in Outlook 2019, 2016, 2013, 2010 etc. So, using this Split PST Tool users can easily split oversized PST file without any hassle. The software can break corrupted Outlook PST file without any compatibility issue.

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Top Reasons to Break up Large PST File in Outlook 2007, 2010, 2013, 2016, 2019

MS Outlook stores emails and all other information in PST files and the size of PST file grows steadily. In general, there used to be a size limit imposed on PST files earlier. Thus in MS Outlook 2000 and 2002, the maximum size limit for PST was fixed to 2 GB only. In Outlook 2003 and 2007, it is 20GB while with the introduction of version 2010 and 2013 the limit was changed to 50GB+ expendable. Later on, the default PST file size limit is 50GB in Outlook 2016 which is expandable to 4 PB (4000 TB).

Therefore, if a user is currently working on the MS Outlook 2002 which allows maximum storage of 2GB so there is a need for that user to split PST into smaller files under regular intervals. It is same in case of 2003 and 2007 Outlook version of PST file which allows a maximum size to be 20 GB approach which leads to a performance issue in Outlook.

It is not an easy task to manage oversized Outlook PST file as it slows down the performance of MS Outlook. Thus, split Outlook PST file into smaller parts to avoid such type of issue in the future.

Sending/receiving operations on a large sized PST file also turns into a time-consuming task. Therefore, it needs split large Outlook PST file into the smaller files by using manual methods or by using the software.

Ways on How to Split a PST file into Smaller Parts that You Never Thought Possible

There are 3 different techniques by which we can split large PST file of Outlook 2019, 2016, 2013, 2010, 2007, 2003 to smaller files. We will discuss each methodology one by one in ascending order of complexity.

Method 1:  Data Archiving Technique to Reduce Outlook Mailbox Size

Data archiving is one of the important techniques that should follow to prevent the hijack of valuable space by less usable data. In Outlook, we can do the same to empty the space consumed by less visible data. These steps can easily be applied to all Outlook versions. Follow these steps to perform the task to split oversized PST file:

Go to File Menu and select the PST file to break.

  • Click on Archive option from the File menu
  • A dialogue box will pop up, Select the option to archive this folder and click all Sub folders, check box and then click a folder from the list.
  • Click on a Date in the archive items older, then dropping down.
  • Click Browse and specify the Name and Path of your PST file.
  • To change the display name, follow the following steps:-
  1. Right click on the Archive Folder => Properties => Advanced => Enter the New Name in the Personal folder dialog box
  2. Now click on Move to Folder option to move the files to the new PST files.

break pst file of Outlook 2016

Method 2: Essential Tips on How to Split PST File in Outlook 2019, 2016, 2013, 2010, 2007

In this method, we will import or export Outlook data to break up large PST file. This method apply to all Outlook versions. Follow below mentioned steps to distinctly break Outlook archive PST file.

  1. Start Microsoft Outlook on your Windows operating system.
  2. In the navigation bar, click on File >> Account Setting >> Select Account Setting
  3. Dialog box open ups next, select Data Files tab and then click Add button.
  4. Then select Outlook Data File (.PST) and then, click on OK to create a new PST file.
  5. You can easily view newly created Outlook data file in the Data Files tab.
  6. Now, import/export the data from existing PST file to newly created Outlook PST file. For this, click on File then, select Import. The Import/Export wizard appears.
  7. Choose the Export option and then click on Next button.
  8. Select Outlook data file and then again click on Next button.
  9. Now, you have to select desired folder items to export. If you want to select the subfolder too, then you have to check the Include Sub Folder option.
  10. Select the Location where you have the newly created PST file to export the selected data.
  11. Click on Finish button. Now you have successfully break PST file into smaller files.

Method 3: Most Effective Tactic to Break PST File in Outlook

This method includes the creation of a new folder and then completely migrate the data of Outlook mailbox to this newly created folder. Follow the below-mentioned guidelines to effectively split large PST file of Outlook 2003, 2007, 2010, 2013, 2016, 2019.

  1. Start Microsoft Outlook email client application on your system
  2. In the navigation bar and go to File then, New >> Outlook Data File
  3. A new dialog box appears, select PST File and click on OK button
  4. Then again a new dialog box opens to Create New Folder. Give a name to this file
  5. Select folder which you want to transfer to the newly created file
  6. Go to Edit Menu and the click on Move to New Folder.
  7. Move items dialog open up next. Click on the New button
  8. Create New Folder window appear next. Give a name to the folder.
  9. Next, select the location where you want to save the created folder. Select New PST file >> OK button.
  10. Move the items from PST file to the newly created folder
  11. Click on OK button to finish the splitting large PST file process.

By using these manual steps to split Outlook PST file into smaller parts, process can be carried out, but we can’t split large Outlook PST file according to the customization in required way. Thus, to perform such operations, we need third party software.

Best Tip Ever to Break Up PST File of Outlook 2019, 2016, 2013, 2010, 2007

Since far we have discussed the top most manual solution to break up large PST file. But these methods have certain limitations. So, it is better to proceed with a safe and secure way to split PST file without Outlook by using Split PST Software.

  1. It can break PST file into smaller files without the loss of any data.
  2. Supports both ANSI and UNICODE file format.
  3. User can make new folders to store the PST file if it is required.
  4. Software designed with user friendly interface that provides result in few simple steps.
  5. User can break up PST file of size 1 MB to 1 TB.
  6. Provides 6 Unique Ways to break up Outlook PST file –
  • Break the PST File by date.
  • Cut PST file by size.
  • Break the PST file by year.
  • Divide Large PST file by Folder (i.e. Contacts, Message, etc.)
  • Separate Outlook PST by Email ID
  • Truncate PST by different Categories

How to Split a PST File into Smaller Parts

Step 1 – Download and run Split PST Tool.

Step 2 – Add PST files/folder(s) & browse Destination Path to save resultant files.

Step 3 – Choose desired Split option (Split by Size, Folder, Date, Year, Email ID, and Category)

Step 4 – Check summary of Split Information & click Next to proceed.

Step 5 – Now, the process to split PST into smaller files completed.

Also Read: Reduce Large Outlook Mailbox Size


Since far we have discussed top most tactics to break up large PST file of Outlook 2019, 2016, 2013, 2010, 2007. But the things you need to know before implementing these techniques to break PST file into smaller files. Create the backup of Outlook data files. Because if somehow, the data get deleted or corrupted then one can use this backup to restart the process. However, these techniques are totally proof of any type of error. But prevention is better than cure. If you have some doubts with the manual tips then you can go with professional software to split large PST file without Outlook. It diminish all kinds of your fear and issue regarding the safety of your mailbox data.

Frequent Asked Question by Users

1. Can I break corrupt PST File?

Yes, file you can divide corrupted Outlook PST file. But, there is no manual solution is available to do the same. In this situation, you have to choose above-suggested third-party application. The tool has the ability to break up large PST file and encrypted Outlook data effortlessly.

2. How to split a PST file & manage oversized Outlook PST file?

In order to manage Outlook PST files, you have to split Outlook PST file into smaller parts. And to do so, you can follow the above-stated manual and automated techniques.

3. Does the free manual solution to cut PST file having any limitation?

Yes of course, the free technique having some restrictions which can affect the complete procedure. So, it is better to choose an automated approach to separate Outlook PST file without losing a bit of data.

4. Does the tool support all versions of MS Outlook?

Yes, the above recommended software to split large Outlook PST file supports all versions of Outlook such as MS Outlook 2019, 2016, 2013, 2010, 2007 and all below versions without any compatibility issue.