USB flash memory drives are now part of our lives. Smaller and with a capacity higher than floppy disks, these devices are the perfect replacement for the old floppies. This time we brought four new models from Patriot (Xporter XT), ATP (ToughDrive), Corsair (Flash Readout) and OCZ (Roadster) and added them to our previous roundup, so we are comparing 13 different USB flash drives. Who is the winner?