Galaxy Note. I expected USB OTG to work with an SD card.... and it did. But I was kind of amazed when I connected my wireless Microsoft Arc Mouse and the little pointer appeared and I was able to use the mouse to point and click. But I struck out when I connected a Western Digital "Book" drive. Android said "USB cable connected", but did not say anything else. Without the mouse thing, I would have expected that. But since it recognized the mouse... Has anybody gotten a hard drive to come up?