1. A method for selecting a method for categorizing a collection of content data files, the method comprising the steps of: identifying a collection of content data files, each content data file comprising image, video, or audio data; determining a number of groups (G 1 ) of content data files that will be generated when a first categorization method is applied to the identified collection of content data files; determining a range of representations (R) that can be presented on a display, each representation being associated with a group of content data files from the identified collection; selecting the first categorization method when the number of groups (G 1 ) is within the range of representations (R); and selecting a different categorization method when the number of groups (G 1 ) is not within range (R).