It was found to be illegal. The ECJ struck it down in 2014: http://www.europarl.europa.eu/legislative-train/theme-area-of-justice-and-fundamental-rights/file-da

It was found to be illegal. The ECJ struck it down in 2014: http://www.europarl.europa.eu/legislative-train/theme-area-of-justice-and-fundamental-rights/file-data-retention-directive http://www.europarl.europa.eu/legislative-train/theme-area-o... It doesn't mean that there can't be national legislation that does something similar "for fighting crime" though.