Received formatted in FAT32, the key functioned the first time under win7 and 8 on a computer, but with very low write-speed USB 2.0 (USB 3.0 not tested). Recognized immediately by Samsung Galaxy S3 GT-I9305 and LG G Pad 8.3. Works immediately read with a Samsung TV UE40F6640.
So a practical key to its double size, compactness, capacity and apparent good compatilibité with windows, android and TV equipment, but that does not shine through his writing flows.