Hi Sorry for a newbie question but I'm currently running Raspbmc on a class 10, 16GB Sandisk SD card, which according to the label has 30MB/s. I have a Lexar 8 Gb USB Flash Drive USB Device, which according to http://usbspeed.nirsoft.net/?g=8gb has 16.92 MB/Sec read and 8.75 MB/Sec write speeds. So ...