Migrate Thunderbird to another drive

Copy Thunderbird files to another PC / reinstall after a clean install / hard drive upgrade

http://email.about.com/od/mozillathunderbirdtips/qt/et_move_profile.htm

Make sure Mozilla Thunderbird is not running.

• Open your (default) Mozilla Thunderbird profile directory.
• Go to that folder's parent directory.
• Move the profile folder (********.default) to the desired location.
• You can rename the profile folder, of course. For example, your new profile could be at E:\Data\MozillaThunderbirdProfile\.
• Open the "profiles.ini" file in a text editor like Notepad or TextEdit.
• You can find "profiles.ini" under "%appdata%\Thunderbird\" on Windows (type the string in the address field of a Windows Explorer window), under the "Library/Application Support/Thunderbird" directory in your home folder on Mac OS X, and under "~/.thunderbird/" on Linux.
• Look for the Path= entry of your profile (it will still point to the old directory).
• Replace the old path with the new.
• If Path= was "Path=Profiles\pi5nk80v.default", for example, make it read "Path=E:\Data\MozillaThunderbirdProfile".
• Make sure IsRelative is set to '0' (the line should read "IsRelative=0").
• Save and close "profiles.ini".