At the train and bus stations, you can find various luggage storage services.
In the Upper Town (Città Alta):
There is a baggage room located outside the airport: you exit and, behind the angled bus parking to Milan and other destinations, in the car park area, find the small building with the sign “Via Milano parking“.
Inside is the luggage storage, operated by the Autostradale company and open daily from 8 am to 10 pm.
After 8 pm, for baggage delivery and pickup you need to call the following number: +39 335 6301944.
The cost of the service is €5 per day, per piece of luggage.