So the last few nights I thought my Sky Q satellite box was going nuts, fan hum, I then remembered from my music streamer if I connected a USB for ripped music, the streamer would always be doing something and the USB was RED HOT.
A quick check on my One Box, USB was RED HOT, unplugged hum noise and fan nearly gone.
Moral if you don't need the USB connected, remove it and it is obviously constantly reading it, using power.
DAILY DEVICES ZFold4 [Mobile], Pro5 [Watch], S8 Ultra [Tablet], Book2 Pro i5 5G [Laptop], Buds Pro2 [Buds] M70A 32/43" [Monitor], Smart Tags+, iPad Mini 5 and iPad Pro 12.9 GEN2 [Tablets], Dell Inspiron G5 Laptop
HOUSEHOLD DEVICES ZFlip3 and ZFlip4 [Mobile], Watch5 40mm and 46mm [Watch], S7+ and S6 Lite [Tablet], QN95A [TV], Q900A [Soundbar], MC28M6075 and MC32K7055 [Microwave], Jet 75 Complete (Vaccum), Samsung Level [Speaker], Buds Pro [Buds], iPhone 12, iPad Air 2, Air tags