How Do I Backup My Thunderbird Emails to an External Hard Drive?

Bhawna Barwal | backup Email Conversion email migration file conversion Software Technology thunderbird | 6 minutes read | Modified on: 21-07-2026
backup thunderbird emails

Overview

Are you looking for a reliable solution to your query how do i backup my Thunderbird emails to an external hard drive. Creating a backup of your Mozilla Thunderbird mailbox is one of the best ways to protect your important emails from accidental deletion, system crashes, malware attacks, or hard drive failures. Whether you’re upgrading your computer, migrating to a new system, or simply securing your email data, maintaining a Thunderbird email backup ensures that your messages, attachments, contacts, and account settings remain safe.

There are multiple ways to backup Thunderbird emails, including manual methods and professional backup software. While the manual approach works well for small mailboxes, it can be time-consuming for users with large amounts of email data. CubexSoft Thunderbird Converter can simplify the process by allowing you to back up multiple Thunderbird mailboxes in just a few clicks. In this guide, we’ll explain both methods so you can choose the one that best suits your requirements.

Why Should You Backup Thunderbird Emails?

Backing up your Thunderbird mailbox offers several benefits:

  • Protects emails from accidental deletion.
  • Prevents data loss caused by hardware or software failures.
  • Makes it easier to migrate Thunderbird to another computer.
  • Preserves attachments, contacts, and mailbox folders.
  • Helps archive important business or personal emails.
  • Allows quick restoration whenever required.
  • Regularly creating a Thunderbird profile backup is considered one of the best practices for safeguarding your email data.

User Query

“I use Mozilla Thunderbird for all my personal emails. I want to backup my entire Thunderbird mailbox to an external hard drive, but I’m not very familiar with technical methods. Is there an easy and reliable way to backup Thunderbird emails without losing any data?”

If you have a similar question, the methods below will help you securely backup Thunderbird email data without any hassle.

Professional Thunderbird Backup Tool to Backup Thunderbird Email Data

If you’re searching for the easiest way to backup Thunderbird email data to a hard drive, then the professional Thunderbird Backup Tool can help you complete the process quickly and securely. Unlike the manual method, Thunderbird Backup Tool allows you to back up multiple Thunderbird mailboxes at once while preserving the original folder structure and email properties. You can download this tool by clicking on this link it will enable to backup Thunderbird emails to external hard drive for free.

This professional software is designed to back up complete Thunderbird profiles, including emails, attachments, contacts, and mailbox folders, while maintaining the original folder hierarchy. The tool also supports exporting Thunderbird data into PST, PDF, EML, MSG, MBOX, CSV, and TXT, making it easier to access or migrate your email data across different platforms. The tool helps to export MBOX, EML, SBD, and other Thunderbird-based files. Now, In the next section, we’ll know the step-by-step process of using a professional Thunderbird Backup Tool, along with its advanced features and benefits.

Learn How Do I Backup My Thunderbird Emails to an External Hard Drive Using Professional Thunderbird Backup Tool

Follow these simple steps to create a complete Thunderbird email backup:

Step 1: Install and Launch the Software

Launch the application after installation using the earlier-mentioned download link

Step 2: Add Thunderbird Mailbox Data

The software provides two options for loading your Thunderbird data:

  • Load the default Thunderbird profile automatically from your system.
  • Browse and add Thunderbird mailbox files stored in a custom location.

Step 3: Select the Desired Output Format

Choose the backup format according to your needs. The software supports exporting Thunderbird emails to formats such as: PST, PDF, EML, MSG, MBOX, etc. It will also let you to backup Thunderbird data on platforms like Office 365, Gmail, etc. So you can choose that as well.

Step 4: Choose the Destination Folder

Browse and select the location on your hard drive, external storage device, or another folder where you want to save the backup.

Step 6: Start the Backup Process

Click the Export button to begin backing up your Thunderbird emails. The software processes the selected mailbox and saves the data to the specified location while maintaining the original folder hierarchy.

Explore More: Betterbird Converter

Key Features of the Thunderbird Backup Tool

The professional backup software offers several advanced features that make managing Thunderbird data much easier.

Backup Thunderbird Emails in Multiple Formats: The utility allows you to export Thunderbird mailbox data into various formats, including PST, PDF, EML, MSG, MBOX, CSV, DOC, HTML, and TXT. This flexibility makes it easier to access your emails across different platforms and applications.

Backup Emails with Attachments: The software preserves all email components during the backup process, including attachments, Images, Hyperlinks, Formatting, Metadata, etc. This ensures that your backed-up emails remain identical to the original mailbox.

Batch Backup of Thunderbird Mailboxes: Instead of exporting one file at a time, you can backup multiple Thunderbird emails in a single operation. This feature is especially useful for businesses and users managing large volumes of email data.

Maintain Original Folder Structure: The application preserves the existing mailbox hierarchy throughout the backup process. Your folders and subfolders remain organized, making it easy to locate emails after the backup is complete.

Supports Default Thunderbird Profiles: There’s no need to manually locate Thunderbird data files. The software can automatically detect the default Thunderbird profile and load it for backup.

Export to Popular Email Services: In addition to local file formats, the tool supports migration to various cloud-based email platforms. The tool enables to export Thunderbird to Microsoft 365, Gmail, Yahoo Mail, etc.

Live Progress Monitoring: During the backup process, the software displays real-time progress, allowing you to monitor the status of the migration.

Generate Backup Reports: Once the process is complete, the application creates a detailed report containing information about the completed backup. This helps users verify that all selected mailbox items have been successfully exported.

Handles Large Thunderbird Mailboxes: The software is designed to process both small and large Thunderbird mailbox files efficiently without affecting the integrity of the email data.

Simple and User-Friendly Interface: Even users with little or no technical knowledge can easily backup Thunderbird emails with no hassle.

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Method 2: Backup Thunderbird Email Data Manually

Thunderbird allows users to export mailbox folders using the ImportExportTools NG add-on. This method is suitable if you only need to export specific folders or a limited number of emails.

  1. Open Mozilla Thunderbird.
  2. Navigate to Tools and open Add-ons and Themes.
  3. Search for ImportExportTools NG and install the add-on.
  4. Restart Thunderbird if prompted.
  5. Right-click the mailbox or folder you want to export.
  6. Select ImportExportTools NG.
  7. Click Export All Messages in the Folder.
  8. Choose your preferred export format, such as MBOX or EML.
  9. Browse to your external hard drive or preferred destination.
  10. Click Save to begin the backup process.
  11. Once the export is complete, your Thunderbird emails will be stored safely in the selected location.

Limitations of the Manual Method

  • Requires installing an additional Thunderbird add-on.
  • Thunderbird must be functioning properly.
  • Time-consuming for large or multiple mailboxes.
  • No option to back up all Thunderbird profiles in a single process.
  • Limited export flexibility compared to professional software.
  • Increased chances of human error during manual export.

For users who need to backup Thunderbird emails with attachments or migrate multiple mailboxes regularly, the professional solution is generally a more efficient option.

End Note

Compared to manual method, a professional solution is a more practical solution of users’ query how do i backup my Thunderbird emails to an external hard drive.  For users who regularly manage large email archives or need to migrate Thunderbird data, this dedicated backup solution can significantly reduce the time and effort required. Users can get this excellent application on Windows OS and Mac OS.