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How can I split Large PST files?

Created: 11 Sep 2013 • Updated: 14 Jan 2015 | 10 comments
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I am having microsoft outlook 2010. my pst file size is 20 Gb. I want to divide my PST as folder wise. Since my pst is too large ,please suggest my some best option by which i won't loss any actaula data.

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RussellSmith's picture

Hello Anna,

To accomplish your need for dividing large PST file in Outlook 2010, take help of advanced PST splitter software. I found an useful review regarding PST splitter utility at:


Russell Smith's picture

It is always advised to archive the PST file on timely basis to avoid oversized PST files problem. From next time onwards keep a check on the size of PST file. as if now you can use any of the following tool to split the PST file. These tools allows PST files to be splitted according to the inputs provided by the user like By Date, By size, etc.You can choose any of the following software

SandeepJ's picture

Hi Anna,

You can split PST files by archiving current oversized PST file to new PST.

You need to create new PST file first and then you can use Archive option from File menu in outlook to mail from oversize PST to this new PST file..

You can use option "archive items older than" to shift mails from oversize PST to new PST by year wise or month wise.

Please find attached file for reference.

split PST.jpg
ricky.martinus987's picture


As your PST size is too large  and you want to divide them into smaller parts by Folder. I would like to suggest you to use Split PST software that would help you to split bulky PST files by Date, Year, Folder and by Size.You can download free demo version to check reliabilty of the tool before investing monet on it.

These are some simple steps which you need to follow while using the software :-

1. Download and install the software.

First, go to Start Button >> Programs >> Split PST >>Click on Split

2.Then, click the Microsoft Outlook 2000/2002 (Old Versions) and Microsoft Outlook 2003/2007/2010(32 bit) (New Versions).

3.Now you can select Split option according to split PST by Size/Date/Year/Folder.After this Split option you can click on Next Button.

4.Then, click the "Browse" button to open large PST file of MS Outlook. And select split options according to your requirements like select size.

5.After this click the “Browse” button to give destination folders to your PST files and click ok.After this click the “Next” button.

6.All information will display on your Screen, Check them thoroughly . After this step click the “Split” button.

7. Now your splitting process completed. At this moment you can compare your PST files.

Click on “Compare PST” button.

ricky.martinus987's picture

If still having any query then feel free to asked me again !!!!!!!

EugeneOwens's picture

To effectively manage your large size PST files into smaller pieces. You can take help of third party tool to split your large PST file according to date, year, size, and folder. The tool also supports all versions of MS Outlook.

JosCol's picture


I've had the same problem with oversized PSt some time ago, so I found this PST Splitter software, which is free. It worked great. The payed version has split options according to different parameters - even by account and folders. I used Outlook 2013, but according to sys. requirements it works with all Outlooks startings with 2002. Hope it will be useful.

JohnPineda's picture

The PST file get corrupt due to Large Size of MS Outlook 2002 and above version for outlook”.At this point, Outlook might simply refuse to perform the specific email operation without any notification or error.With the help of split pst file tool solve all problem during the sending and receiving email messages. MS Outlook have no inbuilt functions to split a large .pst file into multiple .pst files. For more details about this tool please visit here:

use free demo version

barbaraaaustin's picture

PST file into smaller part but failed to decide the right way for you? Here in, you should try our advanced Split PST File Tool. Apart from splitting large sized PST file, this software has various other features. When MS Outlook slows down its process due to large size of PST file, the Split PST File software performs better and breaks large size PST files by date, year, size and folder. This remarkable software help the users to work with many versions of MS Outlook as well as it is compatible with different versions of Windows.n case, you are using either Outlook 2002 or the earlier versions, if the storage capacity reached or exceeds 2 GB, it becomes the requirement to break PST file for better performance.FOR FREE recover of data here..

ameliejones's picture

How to Get Rid of Large PST Files & Create Small Sized, Manageable PST Files Easily?

This is one of the biggest problem for Outlook users, therefore a specialized PST Splitting Solution is developed to solve oversize PST file problems. It helps in follwoing ways:

1. Easily break any size of PST file (from 2GB to 200 GB)

2. Split the PST file according to desired "Size", "Date" and "Year"

3. After splitting Save the data at correct folder location

4. Keep the internal format and information of all data

5. Allows to break 1 into PST file small pieces of 256 MB to 4GB, breaks 1 large PST into yearly PST file (1 file for 1 year) and also breaks 1 pst into two parts according to selected option. 

These points of benefits makes the product most worthy and efficient.

See Product Details at: