Decision making is an important and frequent activity, which involves choosing a variant of several possible depending on certain criteria of analysis. When it comes to choosing cloud storage service, things get more complicated, those who intend to use such a service having access to a multitude of offers. This paper uses the Martin - Deutch algorithm to determine the optimal solution and prioritization of alternatives in three cloud computing services: Dropbox, Google Drive and Microsoft One Drive, to support young people who are usually most attracted to using this type of services, to achieve the best choice.