In this blog, I am mentioning all the important ways and points to break large Outlook PST files into smaller sizes. I am sure after reading this blog completely you will be able to easily split any type of PST file into very small PST files.

Before going to the methods and points or breaking large Outlook PST files first let us know about Outlook, PST files Also, the disadvantages of large PST files, and how many ways are there to split PST files?

What is Outlook?

Outlook is an application from Microsoft known as MS Outlook. The application is mainly used for e-mail purposes to receive and send messages. All big, small, and business companies use this software to transfer information.

About PST file

It is a file format of Outlook which stores all the data of MS Outlook application. Personal Storage Table is the full name of a PST file and events, contacts, calendar and email messages etc. are stored in this PST file.

What are the disadvantages of large PST file

  • Big PST files slow down the speed of MS Outlook.

  • It creates problems like freezing, buffering, errors etc.

  • Data affected like Damage, corruption, deletion or data loss.

  • The problem sending and receiving messages.

These are some of the problems by which we need to break our Outlook PST file into smaller size. For all these reasons apply all the methods and points which I have mentioned below to prevent PST files.

Methods of breaking large Outlook PST file

Although there are many methods available in the market but today in this blog I will tell about two methods which is a manual method and a third party application. To my knowledge these methods are easy to use.

1 Method: Manually split large Outlook PST file

This manual method is little lengthy or tricky you can use it but its take so much time. Sometime while doing the manual steps data may affect badly like: deletion, corrupt or damage.

  • Start MS Outlook application

  • Click on file >> tab account settings icon >> choose accounts setting.

  • Click data files option, now tab add button, select PST file.

  • Auto you will get back to home screen, Review your file, now select items you want move.

  • Now click Move button from top and select “copy to folder option”.

  • Select PST file from the home application home page.

  • At last Click on OK button process will start.


This manual method are little lengthy and tricky to complete so I would suggest you to go with a third-party application which I wrote below this method.

2 Method: MailsDaddy PST split tool for Splitting large PST file

The MailsDaddy PST split tool is a standalone application which never required Outlook configuration and perform all the task within a few clicks without any hassle. It never modify or affected data originality provide 100% secure result.

  • Firstly Download, Install and Run the application.

  • Choose add file, browse or search option for adding a PST file.

  • You will get back to the software interface, and review all files.

  • Choose any one split option by Date, Folder, Size or email.

  • Now select your destination path where you want to save.

  • Click “Next” to start the splitting process

This third-party application makes the Breaking Outlook PST file method process easy. You can see how simple this points are and how rapidly they complete the process. Also this application is the best, safe and 100% secure which never change data originality and give the perfect results to the users.

Final words:

In this whole blog I tried my best to write all the details and information about how you can break large MS Outlook PST files into smaller sizes. You can choose any method which you like most.