The Internet Archive hosts a significant collection of Pimsleur Russian language learning materials. These uploads typically consist of digitized audio files (MP3) corresponding to the Pimsleur Comprehensive Russian courses (Levels 1, 2, and 3), and occasionally include PDF copies of the accompanying reading booklets. While these resources are highly sought after for their pedagogical effectiveness, their presence on the Archive exists in a legal grey area concerning copyright enforcement.
Once you find a zip file on Archive.org, you will likely download 30-90 MP3 files. Here is how to maximize them: pimsleur russian internet archive