How to Resolve "Outlook Data File Too Large to Open" Error? Complete Troubleshooting Guide
By sokerwilliam 09-07-2026 9
Overview: This article will provide users with detailed information and a step-by-step tutorial on how to safely and securely resolve the "Outlook Data File Too Large to Open" error.
Many Outlook users receive error notifications such as "Outlook Data File Too Large to Open." All of this happens because user continue to save all of their new data in the same PST file. This cause more PST files to be created. If Outlook takes a long time to react or refuses to allow the user to execute specific tasks, such as open files, retrieve attachments or emails, copy folders, and so on, there may be a problem with how it operates. The user is undoubtedly dealing with the big file issue, which occurs when a file is extremely large in size. Everyone who receives the notification "Outlook Data File Too Large to Open" should understand how to resolve this issue.
Why does an Outlook PST file take up so much space?
When a user attempts to get emails from their mailbox and receives an error notice stating, "PST file too large to open," it is most likely because the PST file is too huge and Outlook is unable to display the email body. MS Outlook may display the following errors:
- The background sync failed.
- There was an issue accessing the file.
- The reported error is 0x00040820.
- The file xyz.pst has surpassed its size limit.
How can I manually fix the "Outlook Data File Too Large to Open" error?
Users can repair an Outlook.pst file that is too large by utilizing the built-in inbox repair tool, which is often found in the Microsoft Office folder.
Here are the actions one should take to proceed with this process:
- Open the scanpst.exe file.
- Click the Browse button to select the Outlook file to split.
- Click the Start button to begin dividing.
- Select "Make a copy of scanned file before fixing" and save the file in the desired folder from the drop-down menu.
- To repair Outlook Data File Too Large to Open, select the Repair button.
Limitations of Manual Methods
Users should only utilize the manual method described above if their Outlook file contains only a few things. It can be corrected by users, but it takes a long time. Another issue is that ScanPST.exe cannot repair Outlook files that are severely damaged.
Manual methods are simple to understand for users without technical understanding. As a result, those who have only recently begun using MS Outlook may be unfamiliar with it. Since this is the case, expert approaches can make the process easier.
How to Resolve Outlook Data Files That Are Too Large to Open in a Professional Way
Because there are limitations and the procedure is difficult to understand, we always advise users to choose the best and most straightforward technical solution.
When user start using the Softaken Split PST Pro Tool, they can easily resolve this error. This program allows you to easily trim down Outlook files that are overly large without needing to install Microsoft Outlook. To keep Outlook files from being too huge, crop things like emails, contacts, calendars, and tasks. It is also compatible with all versions of Windows. It allows the user to save the output to a location of their choice making it easier to find the data.
Features
- This software is 100% accurate and quick to use, ensuring data accuracy.
- A standalone application allows users to crop Outlook data files without installing additional applications. It is a separate tool that performs all of the necessary steps to finish this assignment.
- Save the output in the desired location: This is a risk-free tool that allows users to select where to save the cropped photographs after the process is completed.
- The Toolkit is compatible with all Windows OS versions, including 11, 10, 8.1, 8, 7, Vista, XP, and Windows Server.
Final Verdict
In this post, we discussed Outlook data files that are too large to open and possible solutions. We addressed both manual and technical solutions to this problem. Why consumers should avoid using manual solutions since they are difficult to understand without technical competence. As a result, we've created a dependable and simple Split PST Tool to make the operation easier and less error-prone. If users are unsure about using this tool, they can test the demo version first. Users can purchase the paid version of the software if they are completely pleased with the trial version.
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