Wow! What a difference in my cards. External Patriot 8GB class 4 2.46MB/s Internal PNY 8GB class 4 5.0MB/s Notice that they are both Class 4 cards. So what's with the speed difference? Could it be fragmentation (on that small a card?). My internal doesn't get used nearly as much as my external, but it does have more of the space used, 80% vs. 55%.