USB is a tempestuous mistress.
The Pandora has a USB2 host, and a USB2GO controller. Both can be used to solve your problem, but you need the right cable.
You see, the USB2 host port is always going to want to operate in USB2 HI mode, but this can be a bore on battery-life.
USB2 can switch itself to USB1 - which also incidentally has hi/lo voltage/speed modes, as well.
The battery-life/USB2 hi-speed equation/solution is this: plug a USB2 hub into the Pandora, and let the hub handle USB1 hi/lo, and UBS2 hi/lo switching *on a port basis* and let the USB2 Pandora port be useful for, say, plugging into a hub *or mostly just USB2 hi only, really truly USB2 hi, devices (like some keyfobs and so on..)
The difficulty is when the USB1 hi/lo modes are selected - this can prevent detection/proper operation of the USB2 devices, until the port is properly reset. Not all devices properly inserted into the Pandora initiate this reset of the USB2 controller for power requirements, because many devices have short/truncated USB setting structures in their firmware.
So, to answer the question: yes, the Pandora USB2 port works great - if you plug it into USB2 devices, exclusively. If you sometimes go back between USB1 and USB2 hi/lo, then you'd be better off using a HUB, which is designed by USB spec to negate a lot of this rubbish (and is thus often also referred to as a buffer device in USB topology), and so on ..