The method mentioned by the official Mozilla site to move thunderbird to new computer is to copy and paste the profile folder to the exact location as it was on the old computer, and that is a great method. However, many people find it very hard to locate the profile, then create a suitable...
If you want to securely back up your Mozilla Thunderbird profile, here’s a simple and reliable approach.
Manual method:
Go to Thunderbird profile folder
Copy entire profile data
Paste it to another drive for backup
This works, but it’s risky and confusing for large data.
Better solution...