I'm not concerned withe the power. I would use Wifi Direct but again, I'd have to have all devices within arms reach to turn on Wifi Direct OR are you suggesting leaving it on all the time? I don't know what kind of power usage WD might use but that scenario might cause me to become concerned about power drainage. MY BT stays on all the time on both my phone and tablet. I could leave it on full time on my desktop. Again, it just seems like a list of devices could be assigned as "safe" for BT transfers.