... 64MB up to 16GB 3. Operating systems: Windows 98SE, ME, 2000, XP, Vista, Window 7, Linux2.4.x, Mac OS 9.2 ... , 4GB, 8GB, 16GBUSB chipsHigh quality real chipsOperation systemWindows 7/Vista/XP/2000/ME/98 and Mac OS 8.6 or aboveReading speed12 ...