PST Merge tool

Top 2 best methods to merge multiple PST files in one

Today in this digital age, email communication has become crucial to our personal and professional lives. Microsoft Outlook is the most famous and preferred email client by people for email communication. It seamlessly manages all the data including contacts, tasks, events, calendars, emails, attachments and more. But over time, Outlook users accumulate numerous PST (Personal Store Table) files, causing many problems like accessibility, slow performance, difficulty in data management, and much more. Before starting the merger process, let us learn about the requirements to merge PST files.

Why do we need to merge multiple PST files?           

There are many reasons to combine multiple PST files into a single PST, some of which are given below.

  • Managing multiple PST files becomes very difficult. However, combining them into one file simplifies data management, making finding emails, contacts, and calendar items easier.
  • The risk of data loss is always high with multiple PST files. By merging multiple PST files into one file we can prevent the risk of data loss.
  • Multiple PST files cause slow Outlook performance. Merging them into one PST file improves Outlook performance. Besides, taking their backup also becomes easy.

How to merge numerous PST files in a single PST file?

  1. Using Manual Method
  2. Using any Professional tool

Manual method to combine multiple PST files into one:

If you want to combine multiple PST files manually, first you will have to create a New Blank PST file in Outlook and second import the data from Old PSTs to a new PST file. Follow the below steps to merge multiple PST files in one file.

Step 1. Create a new Blank PST file

  • First of all, open MS Outlook on your computer or laptop and go to the “Home” tab in the menu bar.
  • Now click on “New Item” and then select the “More Items” option.
  • Select the “Outlook Data Files” option in the “More Items” wizard.
  • Now browse to the desired location where you want to save a new PST file and then give it a suitable name.
  • At last, press the “OK” button.

Step 2. Import the data from the old PSTs to a new PST file:

  • Again, launch Microsoft Outlook on your PC or laptop.
  • Now click on the “File” button and select “Open and Export” option.
  • After that, press the “Import/Export” wizard and then select the “Import from another program or file” option.
  • Now click the “Next” button and select the “Outlook Data File (.pst)” wizard.
  • Then click the “Next” button to continue the process.
  • Now tap the “Browse” button to select the PST file you want to merge and check the “Don’t import duplicates” option, then press the “Next” button.
  • Choose the folder and check the boxes “Include Subfolder” & “import items into the same folder”.
  • Finally, press the “Finish” button to end the process.

By following the above method you can easily merge multiple Outlook PST files into one without duplicate items. However, this process is not useful for all users as you need to have technical knowledge to use it making it difficult for beginners and non-technical users. If you want an efficient and quick Method then go with any professional tool.

Combine multiple Outlook PST files using a Professional tool:

If you want the best professional tool to combine multiple PSTs into a single Outlook PST file then I recommend you to use the MailsDaddy PST Merge and Join tool.

The MailsDaddy PST Merge and Join tool is capable of merging multiple Outlook PST files into one easily and safely. Using this tool, users can skip or remove duplicate items before combining multiple PST files. It also works with password-protected, corrupted, ANSI and Unicode PST files. This utility supports all versions of MS Outlook and Windows.

Key advantages of this tool:

  • Easily combine two or more PST files into one file while maintaining data integrity including emails, attachments, tasks, calendars, contacts, notes and more.
  • Works seamlessly with various PST file types including password-protected, encrypted, ANSI and Unicode formats.
  • Compatible with Microsoft Outlook versions like 2019, 2016, 2013, 2010, 2007 and all previous versions.
  • Provides an intuitive and hassle-free interface for a seamless merging experience.
  • Supports all editions of Windows including Windows 11, 10, 8,1, 8, 7, XP, and Vista.

Step-by-Step Guide on How to merge PST files using this tool:

Step 1: Download and Open the software on your computer or laptop.

Step 2: Click the “Add File” button to select and add the PST files you wish to merge into one.

Step 3: Specify the destination path by clicking the “Browse” button to save the merged PST files.

Step 4: Prior to pressing the “Merge” button, review the PST files. If you want to eliminate or skip duplicate items, simply click the delete icon. Then, click “Merge” to complete the merging process.

Step 5. Finally, click “Merge” to finalize the process.


I hope this article will be useful for you to merge multiple Outlook PST files. Here, I have explained the best and most efficient ways to combine multiple PST files into a single PST. First is the manual way and second is the professional way. The manual method is time-consuming, very lengthy and requires technical knowledge. Therefore, it is recommended to use a professional tool that allows you to merge multiple PST files into one without duplicate items and data loss. You can try the free demo version of the tool and examine its features.

Read also: How to break large Outlook PST files into several parts?

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