alt Hacker NewsI also use the storage box and easily have 30Mo/s bandwidth (and 130Mo/s+ from a hertzner server), so that's strange that you seemed capped at 3Mo/s. Are you not in Europe ? You should probably contact the support to report it, because that almost definitely now how they intend their product to be.
Mo/s means megabytes per second (the French abbreviation for mégaoctets par seconde). It measures data-transfer speed and is equivalent to MB/s (capital B) in English.