In one or more embodiments, the access rights included in the second user profile prohibit the reading of any data stored in the memory of the data storage device. Thus, the control of a data storage device can be carried out using a first user profile provided to allow at least the writing and reading of data in the memory of the data storage device, and a second user profile provided to at least prohibit the reading of data stored in the memory of the device. Any user having the second user profile can write data to the memory of the storage device, but because they have no read access rights they cannot see the data that has been written in the memory of the storage device, regardless of the user profile (first or second profile) of the users who have written data in the memory of the storage device, which further enhances the confidentiality of the data stored in the memory of the storage device, against users other than those associated with the first user profile.

In one or more embodiments, the access rights included in the second user profile only authorize the writing of data in the memory of the data storage device and access to information about the available data storage capacity in the memory of the storage device. In this case, security during use of the device by second-profile users is advantageously even greater. For example, a second-profile user will only be able to find out if there is any available space in the memory of the storage device, and write data (for example store files) in the memory if sufficient space remains available.