Available both in the official sheet of the hard disk on the Intenso website and in the official manual that came with that the board has a blue LED which during operation, particularly read / write, lights. This is a smooth, brazen lie. The LED does not exist. I intensely searched this small, manageable device during operation, was during read and write and not light, even found so small lamp. Intenso lying and deceiving customers. Absolute 5, never buy again.