The speed I have not measured, but the copy of my internal drive via USB3 went pretty fast.
In NAS is your speed anyway can not live, so this is for me not an important point.
It is when copying 800GB movies and music hardly got warm,
with my meter EKM 265 from Conrad Electronics I come in operation (music streaming) to 5.4 watts of power.
Has in the standby consumption is 0,0Watt loud instrument, thus below the detection limit of the equipment, from other measurements I know that this instrument I already values to 0.4 watts shown, so that's really great.
I hope a little in finding to have been someone to something new should arise, I will write it here.