The physical characteristics of this card weight, size (one sixth of a credit card) particularly lends this to communicating mobile markets, personal assistants/PDA, MP3 drivers, Mobile phones, also to digital equipment such as cameras and videos.

On the other hand, the Secure Digital has an integrated security mechanism, the CPRM Content Protection for Recorder Media which insures a high degree of protection and file-encryption. It controls the reading, copying, transfer or erase functions. In this way it becomes possible for the user to forbid or authorize the copy or to offer a reproduction right.