I carry my Thunderbird profile on a USB flash drive so that I can access it from multiple computers. How can I point Thunderbird to that drive in Ubuntu?
How To Move Your Firefox Or Thunderbird Profile To A New Location
Caution: Incorrect editing of the "profiles.ini" file can cause a Firefox or Thunderbird "already running but is not responding" error if the profile cannot be found.
Instead of editing the "profiles.ini" file by hand after performing steps 1, 2 and 3, you could alternately use the Firefox or Thunderbird Profile Manager to create a new profile, using the "Choose folder" option to select the new profile folder.
You can also use the Profile Manager again to delete the original profile (always use the "Don't Delete Files" option as a safety precaution when deleting profiles).
When you restart Thunderbird, go to "Tools -> Account Settings" and for each account (including Local Folders), click on "Server Settings" and verify that "Local directory" is pointed to the correct location.
If it isn't, then click on the "Browse" button to fix it. You may need to exit and restart Thunderbird for these changes to take effect.
The file profiles.ini can be found in your user home .thunderbird directory.
Opening a terminal console and typing:
There you will find the file, the full path should be something like: