Super fast (USB 3): I installed Ubuntu 14.04 LTS x64 on this key (in persistent mode 4GB Data), and on my laptop Asus 16GB of RAM, (which it is in Seven) I boot on the key and it "took off" faster than an SSD, less than 10 s for the Ubuntu desktop! A real mini external hard drive, this key! I also appreciate the clever retractable system. Only downside (hence 4 stars), no LED I / O activity. To see in time, but that price ...