Abstract: A method of distributing content files over a computer network includes encoding demonstration versions of identified files including an identification parameter associated with a user content storage device. Each file further includes demonstration parameters and purchase or rental pricing information. The files are transferred to the storage device. The user selects a file utilizing a player coupled to the storage device and the identification parameter is examined. When access is unexpired the file is decoded and purchase or rental pricing displayed. While the file is being accessed, it is determined whether the user has selected for purchase or rental, rejected, or not selected the file. In response to the purchase/rental selections, the user is provided temporary access to the files. Upon verifying charge to the user, the storage device is provide unlimited access in the case of purchase and limited access in the case of rental to the files.