As my final "test" I transferred directly from the D70 to the OTG. There was a total of 819MB and 279 files on my 1GB CF Card. The copying took 14 minutes. My prior test, using a USB 2.0 card reader took 3 minutes. From the OTG directly to my PC via USB 2.0 took 1 minute. That's a significant difference, but I already was aware that the D70 output is slow. In any case, I can live with 14 minutes in the field if I don't have a card reader handy! And, this 80GB OTG has all my backup computer data files on it also, so it does double-duty.