The deadline of conservation of 90 years of the reports in order to exercise the law of information on the part of the affected one, can be considered reasonable and suitable, taking into account the principle of quality in the conservation (art. 4 LOPD). It is recommended to offer the affected ones a mechanism that allows them to have a certain capacity of decision about the conservation or not of its own data, without harm of that documentation that the Administration has to preserve. The generic invocation to the interest posible of the documental series for the purpose of historical research, cannot be considered sufficient to preserve, all the available information, without more filters the sensitive information contained in the reports attended to. Once established which information enough entity has to be preserved with this purpose, it will be necessary to apply the general rule of anonimització or dissociation of the personal information, or to request the corresponding authorization for its complete conservation (art. 9.2 RLOPD).