You have posted this in the HD-FOX T2 section, but your wording suggests that you are referring to your HDR-FOX T2.I just tried it from the back port
The USB ports on the HDR-FOX T2 are powered both during full switch on, and during active stand-by.I just tried it from the back port and it looks to power all the time.
To answer your question you would need to make sure that the power setting is in power save mode, and also never have any recordings scheduled for when the box is in stand-by.Is there a way for it to only power on boot?
The way to request that is click the "Report" button on your own post. I've done it.If the moderators can move it, it may help future users.
Just checked and I now agree.Power Saving In Standby has no effect on USB power.