A storage method of digital files carried out by a determinist avionic network with predetermined routing; the avionic network being implemented by a communication system comprising at least M end systems (24-1,...,24-M) and at least N switches (22-1,...,22-N) connected to one another; each end system (24-1,...,24-M) being sender and/or receiver of digital files; each switch (22-1,...,22-N) being able to send digital files over the avionic network using data frames, each of at least some switches (22-1,...,22-N) comprising a storage unit configured to store at least some of these digital files; each data frame comprising an identifier defining the origin of this frame in a definite manner; the method comprising a phase for writing digital files comprising the following steps: - determining by a sender end system (24-1,...,24-M) a digital file to be stored corresponding to a modified original file or a new created digital file; - associating a time reference with the digital file to be stored; - sending the digital file to be stored with the associated time reference to K separate switches (22-1,...,22-N) using one or several data frames, the number K being less than or equal to the number N; - generating, via at least some of the switches (22-1,...,22-N), a copy of the digital file to be stored and storing this copy in the storage unit of each of these switches with the associated time reference. the avionic network being implemented by a communication system comprising at least M end systems (24-1,...,24-M) and at least N switches (22-1,...,22-N) connected to one another; each end system (24-1,...,24-M) being sender and/or receiver of digital files; each switch (22-1,...,22-N) being able to send digital files over the avionic network using data frames, each of at least some switches (22-1,...,22-N) comprising a storage unit configured to store at least some of these digital files; each data frame comprising an identifier defining the origin of this frame in a definite manner; the method comprising a phase for writing digital files comprising the following steps: - determining by a sender end system (24-1,...,24-M) a digital file to be stored corresponding to a modified original file or a new created digital file; - associating a time reference with the digital file to be stored; - sending the digital file to be stored with the associated time reference to K separate switches (22-1,...,22-N) using one or several data frames, the number K being less than or equal to the number N; - generating, via at least some of the switches (22-1,...,22-N), a copy of the digital file to be stored and storing this copy in the storage unit of each of these switches with the associated time reference. - determining by a sender end system (24-1,...,24-M) a digital file to be stored corresponding to a modified original file or a new created digital file; - associating a time reference with the digital file to be stored; - sending the digital file to be stored with the associated time reference to K separate switches (22-1,...,22-N) using one or several data frames, the number K being less than or equal to the number N; - generating, via at least some of the switches (22-1,...,22-N), a copy of the digital file to be stored and storing this copy in the storage unit of each of these switches with the associated time reference.