A locking device and method for a storage container provide benefit denial. The locking device includes a base part and a cover part configured to lock to the base part. The cover part is configured to prevent a disk from being removed from a disk-retaining hub when the cover part is locked to the base part, and the base part is configured for easy and secure connection to the storage container. The base part includes a stop for engaging the exterior of the case when inserted into a receptacle in the bottom wall of the container, which precludes the base part from being pulled through the bottom wall of the storage container When the cover part is locked to the base part, the base part cannot be separated from the storage container without causing damage to the media disk.