I have previous ask questions on how to transfer profiles, local folders, sent messages, and all address from my old Windows 10 PC to a new Windows 11 PC. "David" provided a very help way to transfer the profiles between machines which helped immensely. However, I still do not seem to have the address book file(s). Here is where I am and what I would like to be able to do. When I first installed Thunderbird on the new PC, I set it up as an IMAP account with comcast.net. The contacts in the address book were showing. When I copied my Thunderbird profile from the old PC to get my Local Folders, the address book was gone. I repeated the install process and copying process to make sure I was not making an error. The results were the same each time. What I would like to do is to find and directly copy the address file(s) from the old PC to the new. Is this possible and where are they located? Thank you in advance to the time and patience to answer my question. Mike Jacks mleeja@comcast.net