How to Transfer Thunderbird to New computer?

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Written By Shayla Garza
Published On February 6th, 2026
Reading Time 5 Minutes Reading

Moving to a new computer is exciting, but transferring email data can quickly become stressful. If you use Mozilla Thunderbird and want to transfer Thunderbird to new computer, you must do it carefully to avoid losing important messages, folders, or attachments.

This guide explains safe and practical ways to move Thunderbird to new computer, whether you prefer a manual approach or a faster professional solution. Both Windows 11 and Windows 10 users can follow these methods easily.

Why Do Users Need to Transfer Thunderbird to New Computer?

Many Thunderbird users search for this solution because:

  • They bought a new computer or laptop
  • The old system is slow or failing
  • They want to upgrade Windows
  • They need to move Thunderbird data for backup or migration

Let’s now explore the workable solutions.

How to Move Thunderbird Profile Data to Another One Manually?

Thunderbird stores all emails locally in a profile folder. By copying this profile, you can move your entire mailbox to another computer.

1. Open your Thunderbird email client on your system.

2. Then, go to File >> Account Settings.

Export Thunderbird emails to another computer

3. Click on Server Setting and move to the Local Directory option.

4. Copy the complete path and open it in file explorer.

Copy Thunderbird emails to another computer

5. Now, copy all the files into a new folder created on your flash drive.

6. If there are multiple accounts configured with your Thunderbird account, then perform the above steps to copy their data.

Note: Make sure to save all the files of different accounts in separate folders.

7. Now you have all the Thunderbird profile data in a flash drive. Move to the new system.

8. Now, here you have two options to export Thunderbird emails to another account.

Option 1: Either you can configure email accounts to new computer and point it toward the transferred data. For that, follow these steps and export Thunderbird emails to another computer-

  • Open the Thunderbird application on your new system and click on Tools >> Account Settings>> Server Settings.
  • Browse the location under the local directory and choose the folder you transferred fromthe  old computer that have mailbox data.

Option 2: Or you can also import the file into Thunderbird and save it under the local folder.

  • In your new PC attach the flash drive that has the old system data and copy it into a new folder.
  • Then, in your Thunderbird account, click on Local Folder >> Settings.
  • After that, move to a local directory and browse the folder you created on a new computer.

This manual solution will transfer emails from one Thunderbird account to another. However, with it, there are certain limitations.

Loophole With Manual Approach

  • It is a lengthy process, and you need lots of patience to perform the export.
  • There is no filter option to export only selected emails from the Thunderbird account.
  • If you make a single mistake while transferring the data, you can lose your valuable data.
  • More importantly, while you transfer Thunderbird from one computer to another, there are chances of file corruption.

How to Transfer Emails from Thunderbird to New computer in Easy Steps?

To copy Thunderbird profile to new computer you can use the Xtraxtor Thunderbird converter software. Using this tool, you can swiftly transfer Thunderbird local folders to a new computer without any data loss. With its advanced filter options, one can export selective emails from the old system to the new one.

Click on the free download button and check its working process now.

Download Thunderbird Converter tooll

Process to Transfer Thunderbird Emails to New Computer

1. Install and launch the Xtraxtor Thunderbird Converter tool on your Windows OS.

2. Then, choose on Open >> Desktop Email Account >> Thunderbird Account >> Configured Account.

Export Thunderbird emails to another computer

3. Click on Export and choose MBOX format from the given list.

move thunderbird profile to new computer

4. Choose the email folders you want to export.

Export Thunderbird emails to another computer

5. Browse the location to save the exported data file and hit the Save button.

Export Thunderbird emails to another computer

6. Here, you export Thunderbird emails to MBOX file. Now, transfer this file to your new system.

7. Next, install the Xtraxtro Email Converter tool on your new Windows OS system.

8. Then, select Open >> Email Data File >> MBOX File >> Select File or Folder.

transfer emails from one Thunderbird account to another

9. After that, click on Export and choose the Thunderbird option.

Export Thunderbird emails to another computer

10. Browse the location where your Thunderbird data is saved on your system. Then hit the Save button.

Export Thunderbird emails to another computer

Done! Here, you export Thunderbird emails to another computer using this software. You can use the demo version of this tool to perform the export process.

Why Choose the Professional Method?

With this tool, there are various outstanding features, some of them mention here –

  • Allow to export selective Thunderbird emails using different filter options – to, from, bcc, cc, name, time, date, etc.
  • Using this tool, you can also import Thunderbird to Office 365, Yahoo, and many other webmail accounts.
  • Preserve email attributes – to, from, cc, bcc, subject, inline images, hyperlinks, attachments, etc.
  • Export emails directly from Thunderbird profile to another computer with no data loss.
  • Maintain email folders and sub-folders hierarchy and structure while exporting them.
  • Allow to save Thunderbird to PST, PDF, EML, and many other file formats.
  • Easily install and run on Windows 11, 10, 8, 7, Vista, XP, and all other previous versions.

Download Thunderbird Converter tool

Conclusion

Today, in this blog, we discuss two different solutions to transfer Thunderbird to new computer. We mention a manual solution to perform the export process. However, there are some limitations to the native approach. Thu,s we recommend using the Xtraxtor Thunderbird Converter tool to transfer Thunderbird from one computer to another.