I have Nova/NAPSC and Oppo UDP 205 on an extension lead.
With the Nova/Oppo in standby consumption of all 3 is around 6W.
The Nova uses an extra 25W when powered up - no difference with or without a USB stick in the front USB socket. Server mode is off.
I re-enabled auto standby mode last week, as otherwise even if unused for 24 hours it is consuming just over 1 kWh - 30p now, nearly 60p in October, who knows next year.