1. A system for acquiring and adding data on the playing of elements or multimedia files comprising: a plurality of digital devices suitable for accessing or playing said multimedia files, each one of them having installed an identification-characterization program suitable for at least identifying and counting the number of complete or partial plays of each one of said files and which device they have been played in, at least one acquiring and storing device, communicated with each one of said digital devices for at least receiving the data from each one of said identification-characterization programs, said identification-characterization program being suitable for counting said plays at least in a direct and/or weighted manner taking into account a weight assigned to each digital device or user, said weight having been assigned according to the total number of files available in each digital device or available to each user.