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Thunderbird stores your data in a separate location, away from the application, called your profile folder. To move your data, copy your profile folder to the equivalent location on your destination computer.

1. Click on the menu button  , then go to Help and select Troubleshooting Information.
2. Click on Open Directory. Your Thunderbird profile folder will open in File Browser.
3. Close Thunderbird.
4. From your Thunderbird profile folder, go up three levels.
5. Right-click on the Thunderbird folder, and select Copy.
6. Go to the drive you are using to transfer your data, then right-click inside the drive, and select Paste.
7. On destination computer, right-click on your backup Thunderbird folder, and select Copy.
8. Open Thunderbird, and close the account setup window if it appears.
9. Click on the menu button  , then go to Help and select Troubleshooting Information.
10. Click on Open Directory. Your Thunderbird profile folder will open in File Browser.
11. Close Thunderbird.
12. From your Thunderbird profile folder, go up three levels.
13. Right-click inside the folder, and select Paste.
14. When prompted, choose to replace your current data.