3 Methods to Split a Large Outlook File into Small Ones

If you’ve used Outlook for a long time, the Outlook file must contain a great deal of data. Not only will it lead to poor performance, but also it may trigger crashes. In this case, you can split the large file into small ones by 3 means below.

I have utilized Outlook for several years and never considered about the size of PST file until an abrupt Outlook crash. Actually prior to this crash, I have noticed that my Outlook worked much more slowly than before, but I had no idea about its cause at that time. Confronted with this sudden crash, I consulted with my friend, and he told me that it is because the PST file is over-sized. Thus I have to repair it and next split the large file.

If you still can open the original PST file, you can utilize the first 2 methods to split large file. But if he file has been damaged, you have to utilize the final means.

Method 1: Create New Outlook Files and Move Items to Them

  1. For a start, click “New Items” in “Home” ribbon. And from the drop down list, select “More Items”, and choose “Outlook data file”.Create New Outlook File
  2. Then a new window will open up. You need to specify the location and name of the new Outlook data file. And click “OK”.
  3. Repeat the step 2 to create several new files. In navigation pane, you can see all data files.
  4. Next you should open your original file and drag items to move them to one of the new files. At the same time, you need to check the size of the Outlook file.Drag to Move Items to New Outlook File
  5. Once its size is up to the limit, you should turn to the next new file, and then move items to it.
  6. Repeat the above step 4 and 5 to disperse items in the large file separately to all the new Outlook files.

Pros: All operations above can be taken directly within Outlook. Thus evidently, it is free, which is certainly the biggest advantage of this method.

Cons: However, it will demand you to constantly move items and ensure the files’ size simultaneously. This process will require a lot of repeated actions.

Method 2: Archive Older Outlook Data in New PST File

  1. To begin with, you should head to “File” menu.
  2. Then under “Info” tab, click “Cleanup Tools” button and select “Archive”.Archive Button
  3. Next in the new window, you can select specific folders, set a date and choose the location to store the archived Outlook file,Archive Older Outlook Files in New PST File
  4. Later click “OK” to start the archiving process.
  5. Repeat the steps above to create other archived files based on different dates.

Pros: This method has the same edge, namely free of charge.

Cons: Nevertheless, by this means, you will be required to ceaselessly create archived files. Besides, due to its basis of date, it will be difficult for you to verify whether the files are over-sized or not.

Method 3: Utilize Third Party Software to Split Large Outlook File

Outlook is prone to corruption, hence lots of third party software arises. However, most cannot assist us to split PST file. But a veteran repair tool, DataNumen Outlook Repair, can do this job. Not only can it recover PST files, but also it is able to split large PST files.

  1. At first, download it from its website and install it.
  2. After running it, switch to “Options” and select “Split output PST file when it is larger than 1000 MB”. You can change the size limits as per your needs.
  3. Next go back to “Repair” tab. And click “…” button to select the target file.
  4. Finally click “Start Repair”.

Pros: It is apparent that this approach is much more convenient than the first two methods. You don’t need to do repeated operations, just take a few steps.

Cons: Of course, it also has few disadvantages. For instance, you need to buy this tool in the first place. And it can only split files based on size, instead of date.

Author Introduction:

Shirley Zhang is a data recovery expert in DataNumen, Inc., which is the world leader in data recovery technologies, including sql recovery and outlook repair software products. For more information visit www.datanumen.com

3 responses to “3 Methods to Split a Large Outlook File into Small Ones”

  1. […] If Outlook data file stores too much information, Outlook will go through a poor performance. Outlook Not responding issue will take place from time to time. Hence, you need to reduce the file size. Go to “Account Settings” in Outlook. Under “Data File” tab, click “Settings” button. In the subsequent window, you can click “Compact now” button to reduce the file size. Of course, you can opt to split the large file to several small ones, referring to another article – “3 Methods to Split a Large Outlook File into Small Ones”. […]

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