Hard cheeses are those which contain an amount of waterlower than 35%. Hard cheeses, as the name suggests, have a firm texture, sometimes crumbly, since they usually are pressed in order to remove as much of the whey and moisture from the curds, and aged for a long period.
They are often used as grating cheeses. Some of the most popular hard cheeses are Grana Padano, Parmigiano Reggiano, Pecorino Cheese, Cheddar and many more.