How to Split Multiple PST Files?

Introduction: As your mailbox in Microsoft Outlook grows over time, so does the size of your PST (Personal Storage Table) files. A large PST file can lead to performance issues, slower data retrieval, and even the risk of corruption. To address these challenges, splitting multiple PST files becomes a crucial task. In this blog, we will explore why and how to split multiple PST files to optimize Outlook performance and manage your data more effectively.

Quick Approach: Advik PST Splitter Tool is a quick and reliable solution for splitting multiple PST files, helping users manage their Outlook data more effectively. With its user-friendly interface, multiple splitting options, and data integrity assurance, Advik PST Splitter offers a seamless experience to optimize Outlook performance and prevent data loss. Save time and effort by utilizing this efficient tool to split large PST files into smaller, more manageable sizes, ensuring a smoother and more organized Outlook experience.

Table of Contents:

  • Why Split Multiple PST Files?
  • Manual Method to Split PST Files
    2.1 Archive Feature in Outlook
    2.2 Import and Export Wizard
  • Automated Solution to Split PST Files
    3.1 Advantages of Using PST Splitter Software
  • Best Practices for Splitting PST Files
  • Conclusion

Read Also: Top Methods for Exporting EML Files to Different Formats

Why Split Multiple PST Files?

A single large PST file can become cumbersome and lead to various issues. These include sluggish Outlook performance, difficulty in searching for specific emails, and a higher risk of data corruption. By splitting multiple PST files, you can effectively manage your mailbox, improve Outlook speed, and reduce the likelihood of data loss.

Splitting multiple PST files is essential for several reasons:

  1. Optimize Outlook Performance: As PST files grow in size, they can significantly impact the performance of Microsoft Outlook. Larger PST files may cause Outlook to respond slowly, leading to delays in sending or receiving emails, opening attachments, and accessing mailbox folders. By splitting multiple PST files, you can improve Outlook’s speed and responsiveness.
  2. Prevent Data Corruption: Large PST files are more susceptible to corruption, especially if they approach or exceed the maximum size limit (e.g., 2GB for ANSI format and 20GB for Unicode format in older versions of Outlook). When a PST file becomes corrupted, it can result in the loss of emails, contacts, calendar items, and other crucial data. Splitting PST files helps reduce the risk of corruption and safeguards your valuable information.
  3. Ease of Data Management: Managing a single large PST file can be challenging, especially when organizing emails based on different projects, clients, or timeframes. By splitting PST files into smaller, more manageable sizes, you can easily categorize and organize your data, making it more accessible and efficient to locate specific emails or information.
  4. Easier Backup and Restore: Backing up large PST files can be time-consuming and resource-intensive. Splitting PST files into smaller parts allows for quicker and more manageable backup and restoration processes. In the event of data loss or system failure, restoring smaller PST files is faster and less prone to errors.
  5. Facilitate Collaboration: When using Outlook in a team or collaborative setting, managing large PST files can become cumbersome. Splitting PST files into smaller segments allows for easier sharing and collaboration on specific sets of emails or data among team members.
  6. Comply with Storage Limitations: Some email servers or cloud-based email services impose storage limitations. If your email account has a storage cap, splitting PST files helps ensure you stay within the allocated storage space.

Read Also: Top 6 Reasons Users Might Need OST to PST Conversion

Manual Method to Split PST Files

2.1 Archive Feature in Outlook

Microsoft Outlook offers an “Archive” feature to move older emails from your primary PST file to a separate PST file. This method helps to reduce the size of the main PST file while keeping essential data accessible.

2.2 Import and Export Wizard

The “Import and Export Wizard” in Outlook enables you to export selected mailbox folders into a new PST file. You can choose specific folders based on date ranges or other criteria to create smaller, more manageable PST files.

Read Also: Ways to Convert MBOX files to Outlook PST

Automated Solution to Split PST Files

Using a specialized PST splitter software streamlines the process of splitting multiple PST files efficiently. These tools allow you to divide PST files based on size, date, or other criteria, making the process quicker and more accurate.

3.1 Advantages of Using PST Splitter Software:

a. Time-Saving: Automated software can split large PST files in a fraction of the time taken by manual methods.
b. Precision: Advanced algorithms ensure accurate data division, avoiding any risk of data loss or corruption.
c. Bulk Splitting: You can split multiple PST files simultaneously, saving effort and increasing productivity.
d. Customization: PST splitter software allows you to set specific criteria for splitting, tailoring the process to your needs.

Best Practices for Splitting PST Files

a. Regular Maintenance: Schedule periodic PST splitting to prevent files from becoming too large.
b. Backup: Always create a backup of your PST files before performing any splitting operation to avoid data loss.
c. Choose the Right Software: Select a reliable and trusted PST splitter software that suits your requirements.

Read Also: How to Make Gmail More Secure in 7 Steps?


Splitting multiple PST files is a crucial practice for maintaining a well-organized and efficient Outlook mailbox. By following the manual methods or utilizing automated software, you can optimize Outlook performance, prevent data corruption, and ensure a seamless email management experience. Choose the approach that best suits your needs, and start splitting your PST files to enhance your productivity and keep your Outlook data in top shape.

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