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How to Split PST File into Smaller Parts? Guide

Published By Ashwani Tiwari
Tej Pratap Shukla
Approved By Tej Pratap Shukla
Published On June 9th, 2023
Reading Time 6 Minutes Reading

Summery: Are you looking for a solution to split PST file into smaller parts with or without Outlook?, or your PST file has reached the maximum size? If yes, then don’t worry this write-up will explain the safest techniques to break PST into smaller files. 

We all are well aware of the issues when the size of the PST file exceeds its maximum limit. The more the size, it becomes difficult to manage it. So, there are some methods that can be adapted to break Outlook PST files and also deteriorate the performance of Outlook. In this article, you will get the best techniques to split PST into smaller files using the manual method and an automated solution.

Why is it Necessary to Split PST into Smaller Files?

  • The most important reason to truncate a PST file is that it starts running out of space.
  • If the permissible limit exceeds then the data of the PST files becomes inaccessible to the users.
  • Below are some reasons to split a PST file into smaller parts.
  • Large PST files can cause data corruption.
  • Outlook performances slowed down due to large size.
  • When the PST file exceeds the allowed limit, users will not be able to send or receive new emails.
  • The storage space cannot store any more data.

Solutions to Split PST File into Smaller Parts

There are two ways through which you can fix Outlook large PST file problem:

  • Automated Method
  • Manual Methods

Best Alternative Solution to Break Outlook PST File into Multiple Parts

The manual method to truncate PST files is a bit tricky and requires professionalism. But if you are looking for a better and quicker solution, then switch to the PCVITA Outlook Split PST File Tool, which is a complete piece of software tested by experts. This application helps split large PST files by date, size, folder, and year.

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Also, this program maintains data integrity while deleting large Outlook PST. This program separates Outlook data files from all emails, calendars, tasks, contacts, and other items. However, it includes additional advanced features that help you achieve the expected result. So, just download this software and use it to resolve the problem of splitting a PST file into smaller parts.

Steps to Split PST File into Smaller Parts Without Outlook Installation

  • Launch the Software and Click on Add File(s), Add Folder, or Search Files options.

Add PST File

  • Select the Split Option such as Split by Date, Size, Year, Folder, Email ID, and Category as per your need.

Choose split Options

  • After Option Selection (e.g. Split by Size), Specify the Size.

select the split by Size

  • Select the Destination path to begin the process.

start the process

After completing the process of splitting PST files into smaller parts, check the final PST files from the selected location

Manual Methods to Split Oversized PST File

There is no inbuilt feature provided by MS Outlook that helps to reduce Outlook mailbox size in 2019, 2016, 2013, 2010, 2007, and other below versions. Let’s have a look and learn about the techniques.

Method 1: Reduce the PST File with Import/Export Process

Step-1. Open MS Outlook. From the menu bar, click “File.”

Step-2. Go to “Account Settings” and click to “Add files.” Enter the name like abc.pst and then click “OK.”

Step-3. Now, you can view your PST file.

Step-4. Click “File” and then select “Open & Export” and after that select “Import/Export.”

Step-5. Select “Export to a file” from the wizard and click “Next.”

Step-6. Select “Outlook Data File(.PST)” and after that select “Next

Step-7. Choose the folder where you want to export the file and check the “Include Sub-folders” if you want them to be included.

Step-8. Lastly, select the saving location of the exported file and apply the password if you want to, otherwise, click “Cancel.”

Method 2: Use the Move to Folder option to Truncate PST File

Step-1. Launch Outlook. From the file menu go to “Account Settings”.

Step-2. Select “Data Files” and then click on the “Add button” to add a new PST file.

Step-3. Open the default PST file of your MS Outlook profile and select the items that you want to move. Now, from the ribbon, click the “Move” button and select “Copy to Folder.”

Step-4. Choose a file so that all your selected data will move to your default PST file.

Step-5. Now, you can delete the duplicate items from the default file in order to split PST into smaller files.

Method 3: Use Archive File to Reduce the Size of PST File

Step-1. Open MS Outlook. “Select Info” and then go to “Tools” and lastly to “Clean Up Old Items”

Step-2. Select a folder that you want to Archive. After this select the date and click “Browse.”

Step-3. After this click “OK” and save your file at the desired location.

Drawbacks of Manual Method

This method is a lot time-consuming and requires technical expertise to perform it. There is no guarantee of data security and data integrity. The chance of data loss is high with the manual method. The user can not completely rely on this blindly to reduce the size of the PST file.


In this article, we have discussed the manual and a third-party solution to split PST file into smaller parts. Although, the manual solution has its own limitations that we have already discussed. If you are looking for a better, more reliable, and quick solution to reduce Outlook mailbox size, then use the automated technique. It is a cost-effective and efficient tool with the guarantee of no data loss.

Frequently Asked Questions by Users

Q. Is there a way to split damaged PST files with this PST splitter?
A. Yes, the PST separator app can shred healthy PST files as well as large PST files. If you want to split a corrupted or damaged Outlook PST file, then this tool is the best solution.
Q. Do you want to password-protect the PST file? Is it possible?
Yes, users can split password-protected PST files with Regain PST Splitter software. But the user must enter the correct password to complete the process.
Q. What is the largest size of PST that PST splitter software can reduce?
A. There is no file size limit when sharing large PST files. Users can use any of these four options to destroy an Outlook PST.
Q. Do I need to install Outlook to split PST files?
A. No, Outlook does not need to be configured to divide PST files. All operations are performed without installing Outlook.


By Ashwani Tiwari

I am an Expert Technical Analyst, specialized in assisting users with complex technological challenges. Through my blogs and articles, I offer expert guidance to help tackle these technical issues effectively. My true passion lies in providing valuable insights and simplifying complicated technicalities, enhancing user understanding and confidence.