I want to get a usb flash drive to transport files back and forth between work with out burning a CD all the time. My friends in school had several different brands and I noticed some brands required being plugged into a port in the back of the machine and some allowed them to use the hub on the apple keyboard. I refuse to use anything other than my keyboard ports for something this simple. My question is, does anyone know what brands do or do not require being plugged into the ports on the back i.e. directly powered ports and which can be used off of a non powered hub like the keyboard? Thanks, sorry thats a long explanation. Im looking at the Crusers and the Jump Drives, but other brands are welcome.