Note: This steps can also be used to create a backup of your Thunderbird profile folder. If you are using a local transfer device, remove it safely from the source computer.The device you are using to transfer your data, then select Paste Paste Item. Make sure you have File Browser set to show hidden files.)

thunderbird folder and select Copy Copy 'Thunderbird'.

Right-click Hold down the control key while you click.

From your Thunderbird profile folder in Windows Explorer File Browser Finder, go up three levels go up two levels open the Go menu and select Enclosing Folder two times.

Your Thunderbird profile folder will open in Windows Explorer File Browser Finder. Locate the 'Profile Folder' entry, then click Open Folder Open Directory Show in Finder.Open the Help menu and select Troubleshooting Information. Click the menu button, then click Help and select Troubleshooting Information.Connect a device for data transfer, either a local one such as a USB flash drive, or a remote storage drive.Thunderbird's new installation will use the already existing data. Note: If you have used the Profile Manager on your source computer to store your Thunderbird profile folder in a custom location into a remote storage drive, create a new profile on your destination computer and set that profile to use the same location.

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