This message was posted on behalf of Intel Corporation
The Intel® NUC provides USB changing ports. This is why the Blue Ray LED light remains on.
See attachment for USB information.
Also, take a look at the Intel® NUC, technical product documentation on page 28
USB.PNG 119.3 K
I guess I assumed though that only the Yellow port would continue charging when the NUC was in sleep mode.... but apparently, all external USB ports on the NUC will continue to provide power when it's in Sleep mode.