OST File Has Reached Maximum Size Cannot Delete – What To Do ?

Rollins Duke   
Published: May 13th, 2024 • 5 Min Read


Summary: OST file has reached maximum size error message appears when the size of OST file reaches its configured file size or threshold limit. In this blog post, we have shared the best solutions that can help users resolve the OST file size issue easily.

Is your Outlook saying that mailbox has reached its maximum size limit and not allowing you to send or receive emails? Are you facing trouble in accessing your outlook account due to an oversized OST file? If your answer is yes, then this is the right place to get the best solution for this issue. Read the complete blog and stay tuned with us for more information.

What are the possible reasons for OST file has reached its maximum size?

There are multiple reasons due to which users have to face this type of issues. Some of them are mentioned below:

  • File Size Limitation: The older version of Outlook 2002 used ANSI format which had the size limitation of 2 GB. It was filled in a few months’ time when communicating with large attachments.
  • Change in Registry entry: Installing two different versions of Office like Outlook 2007 and 2013 on the same system may lead to errors. Some registry entries might not update properly leading to OST errors.
  • Threshold limit approaching: In the latest version of Outlook 2007 and 2010, the UNICODE format was used with a limit of 20GB. This too was filled with regular use causing OST size issues.

What are the techniques to resolve the error?

  1. Manual Solution
  2. Technical Solution

Manual Solution Outlook data file OST has reached maximum size

Method 1: Unwanted Items Should be Deleted

  • First, users have to open the OST file. Now, users have to mark those items which are not important for the future aspect.
  • After that, users can Delete all the marked items.
  • Finally, Erase the deleted Items folder permanently.

This helps to reduce the size of the OST files. Also, it solves the problem for the Outlook data file has reached the maximum size of Office 2016. If user is still facing some problems, then use another solution.

Method 2: User should Archive their Data

  • First, users have to open MS Outlook and then select the File option.
  • Thereafter, press on the Info option and then click on the Mailbox setting.
  • Now, click on Cleanup and then Archive those files.
  • Then, select the Inbox and then select the date that user wants to archive.
  • Finally, click on the browse button. Then select the Path where user wants to save the archive file.
  • At last, you can easily create a separate Archive folder.

After following the above solution, the user can solve the query for an Outlook file has reached maximum size. But there are some limitations to these solutions. Users can refer to them as mentioned below:

Limitations for the Above Manual Solutions

  • A non – technical user can only work under complete guidance.
  • It is a time-consuming process, and there is a chance of data loss.
  • This process cannot reduce the OST file of large size.

Direct Solution for OST file reached maximum size cannot delete

BitRecover OST Splitter Wizard is an amazing tool for accomplishing the task of OST file has reached maximum size. It is one such program which is designed especially for solving the issue of Outlook data file has reached maximum size ost cannot delete. This tool has advance features, which makes the tool worthwhile to invest in it.

Download for Windows Download for Mac

This software also provides very lightweight service features and uncluttered user interface that helps users in processing files in a very short time. This application always keeps a hierarchy of internal system folders during the whole conversion process.

How to solve ost file has reached maximum size – Complete Working steps

Follow these simple steps for completing the task effectively without any hassle:

  1. Download and install software on your Windows and Mac Machine and run it. Its welcome screen will provide you some instructions about the working process.
  2. When uploading a large OST file, choose one of the two options: Select Files or Select Folders.
    Select Files
  3. You can see all directories after inserting the OST file in the program panel, choose the needed folders, and then press the Next button.
    choose needed folders
  4. Now, the software allows users to pick between multiple different sizes of Outlook data files: 2 GB, 5 GB, and 10 GB. Select a destination path and then press the Convert button.
    multiple different sizes
  5. You may observe the live process of producing new data files from an enormous OST file right now.
    outlook.ost file has reached its maximum size
  6. After the task has been completed successfully, click the Ok button to confirm your action.
    completed successfully
  7. The destination route will then be automatically opened. You will be able to obtain output data in PST format.
    destination route
  8. Finally, open Microsoft Outlook and import the resulting files. Your difficulty will be resolved.
    open Microsoft Outlook

Let’s Wrap Up

Here, in this blog we have explained about the OST file has reached maximum size. Outlook is one of the demanding email applications due to its outstanding and amazing features. Therefore, users are searching solution for ost file has reached maximum size. We have discussed two approaches in the above blog. Users can try any of these methods to solve this particular issue. By following above – mentioned steps users can accomplish this task easily.

If user has any kind of doubt, they can go with the free trial version of the application. After having satisfaction user can purchase the licensed keys of the software for more benefits and unlimited conversion.

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