Petite, design, and convenient

I tried a USB key to listen to the mp3 music in my car. This required that the key is very short, so as not to exceed the USB. This key exceeds 1 cm, which is quite correct for this purpose.
I also wanted a large capacity to store 25 GB of my discography. The key to an actual capacity of 30 GB (not 32GB as advertised, requires that sellers of such equipment stop taking us for hams!).

Finally I wanted a key not write too slow, especially in reading. The speeds are correct for on USB 2.0: 1 hour to fill 30 GB of music. 30 seconds before the music starts in the car (but then it also depends on the USB interface of the vehicle).

Note that on my car (Peugeot 207SW) USB 3.0 are no longer recognized when I cut the engine key (you must then disconnect and reconnect the key). That's why I came back to USB 2.0.
So I would say that the key is suitable for my use; Avoid if lon search speed.