If you are looking for legitimate ways to learn the Caro-Kann from GothamChess, here are the official resources: Official GothamChess Caro-Kann Resources
Utilizing the c6 and d5 moves to challenge the center while maintaining a "rock-solid" structure.
Prioritizing the development of the light-squared bishop (the "problem" piece in similar openings like the French Defense) to active squares like f5 or g4 .
His comprehensive Caro-Kann Course on Chessly is his primary paid offering for this opening, containing detailed video lessons and PGN files.
Typically, such file names are associated with unofficial or unauthorized downloads of premium chess courses, such as those hosted on GothamChess or Chessable.