Article D47-8 of the French Code of Criminal Procedure
Without prejudice to their preservation on media placed under seal or appended to official reports, as evidence in the proceedings during which they were extracted, acquired or transmitted, the illicit content mentioned in 3° of the article 230-46 may be retained by the judicial police officers or agents mentioned in the first paragraph of this article, for a period of three months. This storage is carried out under conditions guaranteeing…