A method for storing data, wherein the method comprises the following steps in order to store a file: - automatically generating a distribution schedule, which contains instructions for generating file fragments (F1-F4) of the file by means of an error correction method and identifiers of a number of memory services (SD1-SD6), in the non-volatile storage media (SM1-SM6) of which the generated file fragments are to be stored, by a file management server or by a user computer system (104, 162); - performing the error correction method specified in the distribution schedule for generation of the file fragments from the file by the user computer system, wherein at least one of the file fragments contains error correction bits; - sending an authorisation enquiry of the user computer system for storing the file fragments in the memory services (SD2, SD4-SD6) identified in the distribution schedule to the file management server via a network; - in response to receipt of the authorisation enquiry, requesting (608, 424) an authorisation token by the file management server from each of the memory services identified in the distribution schedule and forwarding the authorisation tokens generated by the identified memory services and obtained therefrom by the file management server to the user computer system; and - storing the generated file fragments via the network in the storage media (SM2, SM4-SM6) of the identified memory devices by means of authorisation verification by the authorisation tokens, with the user computer system bypassing the file management server, such that the file management server does not have access to the content of the transmitted file fragments; wherein metadata, which allow the reconstruction of the file from the stored file fragments, are stored in the user computer system and/or the file management server and are protected against access by the memory services. - automatically generating a distribution schedule, which contains instructions for generating file fragments (F1-F4) of the file by means of an error correction method and identifiers of a number of memory services (SD1-SD6), in the non-volatile storage media (SM1-SM6) of which the generated file fragments are to be stored, by a file management server or by a user computer system (104, 162); - performing the error correction method specified in the distribution schedule for generation of the file fragments from the file by the user computer system, wherein at least one of the file fragments contains error correction bits; - sending an authorisation enquiry of the user computer system for storing the file fragments in the memory services (SD2, SD4-SD6) identified in the distribution schedule to the file management server via a network; - in response to receipt of the authorisation enquiry, requesting (608, 424) an authorisation token by the file management server from each of the memory services identified in the distribution schedule and forwarding the authorisation tokens generated by the identified memory services and obtained therefrom by the file management server to the user computer system; and - storing the generated file fragments via the network in the storage media (SM2, SM4-SM6) of the identified memory devices by means of authorisation verification by the authorisation tokens, with the user computer system bypassing the file management server, such that the file management server does not have access to the content of the transmitted file fragments;