How To Merge Multiple PST Files into Single One?

Know the best way to merge multiple PST files into single one in just 3 steps. Combine Outlook data files with emails, calendar data, contacts, notes and much more.


In today’s time period, email clients play a very important role in our daily life. There are many email clients available in the market and Microsoft Outlook is the most favorite email application that is used for both business and home purposes. Outlook has released new versions from time to time to provide users better security and more storage space. Now, users upgrading from an old to a new version of Outlook and as a result, they have multiple PST files. Merge multiple PST files into single one is the best and easiest way to manage PST files in one place. So, in this blog, I will describe the process of how to merge PST files into one file without duplicates. Keep read on...

What is PST File?

PST is known as Personal Storage Folder in Outlook which contains all Outlook data like emails, contacts, calendars, notes and much more. Outlook gives permission to export all data items in .pst file format and similarly, it supports PST file to import data in Outlook. Microsoft provides feature move items and creates an archive file (separate PST file). The archive file is easily open with Outlook at any time. PST file has file size limitations in different versions, in latest Outlook 2013, 2016, 2019, a maximum size limit is upto 50GB. Outlook 97 to 2000 supports the ANSI PST file format. Outlook 2013 and the latest versions support UNICODE PST file.

Benefits To Merge Multiple PST Files Into Single One

There are many benefits for merging Outlook .pst files into single one. Some benefits are mentioned in the below section:

  1. It is very difficult to handle multiple Outlook data files, and there is a possibility that the data is misplaced or damaged. Merging PST files into one file is easy to manage and prevents data corruption.

  2. Several PST files are not imported into Outlook at the same time because Outlook supports to import only one file at a time. When users combine multiple Outlook PST files into one, importing them in Outlook is easy.

  3. Multiple Outlook PST files affect the performance of Outlook. Therefore, it is a good option to merge them into one PST file for smooth Outlook performance without hanging.

Techniques To Combine Outlook PST Files Into One PST File

Outlook does not provide any feature or inbuilt utility to combine multiple PST files into one. However, there are some free tricks that can be used to merge PST files together. First of all, you need to create a new PST file in Outlook and then import all the Outlook data files into a newly created PST file. This process is tough to perform, especially by the non-technical person as it is lengthy and creating and importing process can be confusing for them. As we all know, Outlook gives permission to import only one PST file at a time, so It takes a lot of time to import several PST files one after the other.

Suggested Solution to Merge Multiple PST Files Into Single One

I personally do not enough time to import multiple PST in Outlook one by one. To make this task simple and fast, I would suggest you SysTools PST Merge Software which is a third-party solution. This software is 100% safe and tested by experts. All you have to do is add the PST files in the application panel and it automatically merge multiple PST files into single one file. It gives three option, Join, Merge and Merge Contacts, you can easily choose any of them that is suitable for you. The tool supports to merge PST files in Outlook 2019, 2016, 2013, 2010, 2007 and so on. It also smoothly works on Windows 10, 8.1, 8, 7, and other below versions.

Steps - How to Combine Multiple Outlook PST Files into One

Here I am going to share its working process in the below section. Follow the steps:

Step 1. Download PST Merger software and install it on your system

Step 2. Add PST files into software panel by clicking on Add Files or Folder option

Step 3. Next, click on the Merge option under Options section

Step 4. In Advanced Option, click on Remove duplicates and also choose other option according to your need like Split PST file size and Excluded Deleted Items

Step 5. Browse to select the location to save the merged PST file and click on the Merge PST Files button to start the process.

Done! This is the simplest and quickest way to merge multiple PST files into single one without corrupting or losing any kind of information.

The Final Words

Here, I suggested the best and tried PST Merger Software that is helpful for merging Outlook .pst files into single one with all emails, contacts, tasks, notes and other items. It supports both ANSI and UNICODE PST files to merge multiple PST files into single one without any trouble. You can also try its free version to check its working.

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