System for making available multimedia contents for reading and reproduction, comprising: - at least one first multimedia content reproduction apparatus comprising • a communication interface (111,112), and • processing means in communication with said communication interface (111,112), - a removable memory device, containing at least a plurality of multimedia contents and connectable, by means of said communication interface (111,112), to at least said first reproduction apparatus and preferably to at least one second multimedia content reproduction apparatus, wherein said first reproduction apparatus comprises processing means configured for: a. reproducing or reading, by means of said communication interface (111,112), at least one of said multimedia contents that are present in said removable memory device; b. generating at least one choice datum defining at least one set of favourite multimedia contents; c. writing, on the basis of said at least one choice datum, at least one metadatum directly into said removable memory device, wherein said metadatum is associated with at least one of said favourite multimedia contents, and wherein said metadatum defines the associated content as belonging to at least one set of multimedia contents; d. making available for reading and reproduction, by means of said communication interface (111,112), all the multimedia contents that are present in said removable memory device or only said at least one set of multimedia contents, defined by said metadatum as belonging to said set, said system being characterised in that said metadatum is an extension of a filename of said at least one of said multimedia contents and said processing means are configured for setting the character string representing said extension to values other than the standard ones, for multimedia contents that are present in said removable medium and that are not part of the at least one set of favourite multimedia contents, so that a reproduction apparatus that cannot extract and process filenames with extensions other than the standard ones, will not access the files having such extensions, and will automatically select for reproduction the set of contents consisting of files having a recognised standard extension. - at least one first multimedia content reproduction apparatus comprising • a communication interface (111,112), and • processing means in communication with said communication interface (111,112), • a communication interface (111,112), and • processing means in communication with said communication interface (111,112), - a removable memory device, containing at least a plurality of multimedia contents and connectable, by means of said communication interface (111,112), to at least said first reproduction apparatus and preferably to at least one second multimedia content reproduction apparatus, a. reproducing or reading, by means of said communication interface (111,112), at least one of said multimedia contents that are present in said removable memory device; b. generating at least one choice datum defining at least one set of favourite multimedia contents; c. writing, on the basis of said at least one choice datum, at least one metadatum directly into said removable memory device, wherein said metadatum is associated with at least one of said favourite multimedia contents, and wherein said metadatum defines the associated content as belonging to at least one set of multimedia contents; d. making available for reading and reproduction, by means of said communication interface (111,112), all the multimedia contents that are present in said removable memory device or only said at least one set of multimedia contents, defined by said metadatum as belonging to said set, said system being characterised in that said metadatum is an extension of a filename of said at least one of said multimedia contents and said processing means are configured for setting the character string representing said extension to values other than the standard ones, for multimedia contents that are present in said removable medium and that are not part of the at least one set of favourite multimedia contents, so that a reproduction apparatus that cannot extract and process filenames with extensions other than the standard ones, will not access the files having such extensions, and will automatically select for reproduction the set of contents consisting of files having a recognised standard extension.