Until 13:00h you can leave your luggage at the reception. After that we recommend to use a external locker. Berlin Central Train Station (and others) offers travelers the ability to store luggage safely and comfortably. The opening times for the baggage area is daily 6:00 to 22:00 h (bag lockers operate 24 hours). Currently, the fees are five Euros per full day. You will find the baggage area on the first floor on the east side of the hall. More lockers in Berlin can be found here: Luggage Storage Berlin