In one or more embodiments, while the first user profile is configured to include access rights further authorizing the deletion of data in the memory of the data storage device, the second user profile may be configured on the contrary to include access rights further prohibiting the deletion of data in the memory of the data storage device. In this case, while the first user profile includes access rights authorizing the reading and writing as well as the deletion of data stored in the device memory, the second user profile includes access rights that do indeed authorize the writing of data in the memory of the device, but prohibit the reading of data and the deletion of data stored in the memory of the device. Thus, not only are the users associated with this second profile unable to read the stored data, they cannot delete them either.

In one or more advantageous embodiments, the access rights included in the second user profile may be restricted only to the writing of data in the memory of the data storage device. In this particular case, a user not associated with the first user profile, and recognized as such during his or her use of the storage device, can only place data in the memory of the storage device. The user will not have any access to information concerning the data stored in the memory of the storage device, whether the data are stored by that user or by another user, and he or she will not be able to take any action involving them. The confidentiality of data stored in the memory of the storage device, managed by a user associated with the first user profile, can thus advantageously be optimized by limiting the rights associated with the second user profile as much as possible, in particular concerning writing/reading/modification/deletion access rights.