We had to leave in the afternoon, so we left our luggage in this storage room near the station. You have to book online because then you need the QRcode. The cost is almost 5€ per luggage and insurance. You get the instructions to go to this Hostel where you have someone who receives you (according to the indicated times) takes your luggage with the QRcode, and the same happens when you go to pick it up. Very convenient