Manual Steps to Reduce PST File Size in MS Outlook

Last updated on: November 1st, 2024 5 Min Read

If you’re using Microsoft Outlook, you’re likely familiar with PST files. These files store all your email, calendar, and contact information in one place. They’re fantastic for creating backups of your account’s data, allowing you to retrieve important emails whenever you need them. However, as your mailbox grows, so does the size of your PST file—often leading to performance issues.

The challenge arises when your PST file approaches its size limit, typically around 50GB in recent Outlook versions. A bloated PST file can cause Outlook to slow down, display errors, or even become corrupted. So, it’s crucial to manage the size of your PST files effectively.

Why You Should Reduce PST File Size

Managing the size of your Outlook PST file is important for several reasons:

  1. Performance Boost: A large PST file can make Outlook sluggish. Keeping your file size in check can enhance the application’s overall performance.
  2. Space Management: Larger files occupy more space on your hard drive, which can hinder other applications’ performance. Regularly compacting your PST file helps free up disk space.
  3. Corruption Prevention: Oversized PST files are prone to corruption. Regularly reducing their size minimizes the risk of losing important emails and data.

Methods to Reduce PST File Size in Outlook

There are a couple of straightforward ways to manage and reduce the size of your PST files in Outlook 2019 and earlier versions.

1. Emptying the Deleted Items Folder

This method is a simple and effective way to reclaim space:

  • Open Outlook and click on the File tab.
  • Navigate to the Info section and select Tools.
  • Choose Cleanup Tools and then click on Mailbox Cleanup.
  • In the dialog that appears, click on View Deleted Items Size to see how much space it’s occupying.
  • If it’s significant, click on the Empty button to permanently delete all items in the Deleted Items folder.

This method works best if you have a lot of emails sitting in the Deleted Items folder.

2. Compacting the PST File

Outlook offers a built-in feature to compact PST files safely:

  • Launch Outlook and click on the File tab.
  • Go to the Info section and select Account Settings.
  • Choose Account Settings from the dropdown menu, and then navigate to the Data Files tab.
  • Select the PST file you want to compact and click on Settings.
  • In the new window, click on Compact Now.

This process can effectively reduce the size of your PST file while preserving its integrity.

Limitations of Manual Methods

While these methods are helpful, they come with limitations:

  • Potential for Corruption: Frequent compacting increases the risk of file corruption, which can lead to data loss.
  • Technical Knowledge Required: Users may need to have a basic understanding of Outlook settings to navigate these processes successfully.
  • Time-Consuming: Depending on the size of the PST file, these methods can be time-consuming.

A Better Solution: Using a Softmagnat PST Splitter Tool

If you’re looking for a more reliable and efficient way to manage your PST files, consider using the SoftMagnat PST Splitter Tool. This third-party application allows you to split large PST files into smaller, more manageable pieces without the risk of data loss. It’s user-friendly and doesn’t require you to open Outlook, making it an ideal solution for those who want to ensure their data remains intact.

Conclusion

Managing PST file size is crucial for maintaining Outlook’s performance and protecting your valuable data. While there are manual methods available, they come with limitations and risks. Using a PST splitter tool like SoftMagnat is a safe and effective way to manage your Outlook data without compromising your email integrity. Regular maintenance can save you from potential headaches down the road.


FAQs

1. What is a PST file?
A PST (Personal Storage Table) file is a Microsoft Outlook data file that stores your emails, calendar events, and contacts locally on your computer.

2. How can I tell if my PST file is too large?
If you notice Outlook slowing down or displaying error messages, it may indicate that your PST file is reaching its size limit, which is typically 50GB for most Outlook versions.

3. Can I recover a corrupted PST file?
Yes, you can use the Inbox Repair Tool (Scanpst.exe) that comes with Outlook to attempt to recover a corrupted PST file. However, there’s no guarantee of success, so regular backups are essential.

4. Is it safe to manually compact my PST file?
While compacting your PST file is generally safe, doing it too frequently can increase the risk of file corruption. It’s best to use it judiciously.

5. How does a PST splitter tool work?
A PST splitter tool breaks down large PST files into smaller files, making them easier to manage. This process does not alter the contents of the emails, ensuring that your data remains intact.

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I am a Technical Writer at SoftMagnat Software and having experience around 8 years, focused on creating clear and user-friendly documentation for software products. I simplify complex concepts into easy-to-understand guides, manuals, and tutorials.