too slow (USB2)

Delivery impeccable delivered 2 (announcement between 3 and 5) the key problem is very slow. A test of 6 files representing 4 GB transfer speed 3.87 MB / second. Same assumptions with another more expensive cle 26 MB / s or 10 times faster. therefore buy only if you're really not in a hurry !!
Warning same references but other supplier prices 5 5 but shipping over 20 therefore more expensive result

The slowness of the key is that it is only conformed to the USB2 standard. If you are advocating the cost relative to the speed you can buy
If you want a quick key take into line with USB3 and thus more expensive