Netgear R7800 | enable/disable usb ports... how? Experiences?

Hi,
As titles I would like to enable and disable usb port: on one of them I have connected a usb fan that could be stopped at night.
I read the wiki where it is suggested to "play" with gpio but maybe one of you has already done it (moreover I cannot play to much, the other usb port is used for ups monitoring).
Thanks for any suggestion and feedback!!

There's usbctl but it doesn't work on all USB controllers, trial and error.