Browse - Computer Tips - Where is my Thunderbird data?
Date: 2008nov10 Updated: 2015aug18 Product: Thunderbird Q. Where is my Thunderbird data? A. On Windows its in: Look in...c:\Users\<USERID>\Application Data\Thunderbird\ProfilesWhere <USERID> is your userid. Then look for the folder called <Random Junk>.default -- that's where your precious mail is stored.