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Written By
Rohit Singh -
Updated on
February 23rd, 2026 -
Read Time
5 minutes
Summary: As an Outlook user, encountering massive PST files can be daunting and frustrating to handle. Large PST data files can slow down your Outlook, increase the risk of corruption, and make data management more challenging. If you are searching for how to split large PST file into smaller parts, you’re not alone. In this blog, we’ll walk you through both manual and professional methods to split PST files. From manual steps to using a professional PST Splitter Tool, we’ll cover everything you need to streamline your Outlook experience.
Benefits of splitting a pst file into smaller subunits. Some of them are mentioned below.
There are mainly two ways to split PST files into smaller parts. Here, we are going to discuss both the manual and professional methods one by one.
In this section, we are discussing two steps that will use Microsoft Outlook to perform the steps.
We need to perform this method each time for every file/folder.
One of the best and simplest methods is to perform by using a PST Splitter. This tool helps split your PST file by size, date, sender, or folder option. Due to its intuitive GUI, any user whether they have technical knowledge or not can operate the tool smoothly and perform the splitting process without losing any data. Additionally, it has an in-built feature to ignore the duplicates present in it even you can save all the files separately and can protect those files using a password.
We conclude this blog with our last word, the whole blog describes how to split PST file into smaller parts. Reading this blog will provide you with the knowledge to easily and quickly split the PST file into smaller chunks. The blog contains a manual and professional method, which uses MS Outlook and the PST splitter tool to split, with its step-by-step guidance a user will find it easy to perform those methods.
Also Read: Import PST Files to New Outlook.
Ans. Large PST files can slow down Outlook and sometimes even cause errors or corruption. Splitting the file into smaller parts helps improve performance and makes it easier to manage.
Ans. The simplest way is to use a PST Splitter Tool. It lets you add the large PST file, choose how you want to split it (by size, date, folder, etc.).
Ans. No, a professional PST Splitter Tool keeps all emails, attachments, and folder structure the same. It only divides the file into smaller parts without changing the original data.
Ans. Yes, a professional PST Splitter Tool supports batch processing. You can add multiple large PST files and split them at the same time.
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