The size of the part: sometimes, %1 will only give an estimated size here, because calculating the exact size would take too much time; when this is the case, it will be made visible by adding "(est.)" to the size displayed.
La mida de la part: algunes vegades,% 1 tan sols us oferirà una mida estimada perquè trigaria massa a calcular la mida exacta. Quan aquest sigui el cas, serà visible perquè s' afegirà "(est.)" a la mida mostrada. file name of the attachment.