WHY DO I GET FINGERPRINTED IN EUROPE AND HOW LONG WILL THE FINGERPRINTS BE STORED?

When you enter a European country illegally your fingerprints will be taken and recorded in a European wide database called Eurodac. The police or border control will take your fingerprints and then they will be stored in the Eurodac for a maximum time frame of 18 months. Your fingerprints are stored firstly so that the EU can see what country you entered first. This is because generally the first country you enter should be responsible for your asylum claim, unless you have core family in another EU country. Also your fingerprints are taken when you apply for asylum. Then they will be stored for 10 years in the Eurodac database.ι
So if for example you enter Europe in Greece, you will get fingerprinted by the authorities. If you then move on to for example Austria and apply for asylum there, the Austrian authorities will look in the Eurodac database. There they will find the fingerprint from Greece and most likely try to send you back, because Greece is according to the law the responsible country to carry out your asylum request.