I chose this little versatile model to keep it on me when I need a USB key. No problem on a Mac, Android phone and Freebox Server, flows (note: this is USB 2.0, not 3.0!) Very correct, but big disappointment: impossible to operate this device on a multifunction copier Sharp. In fact it is not a standard USB key type "USB Mass Storage", in fact it is a device type "SD card reader" with a SD / eMMC built. So compatibility is limited, and I'll probably replace with a real USB key ...