Small, fast, well protected, ideal "extra hard drive"

I use the stick as a backup of my personal files, especially as hard drive replacement for my Chromebook. For this, the speed ranges from good (only the initial filling lasts), the stick is easily recognized and described by Chromebook, Windows XP to Win7 and various Linux distributions. The tight fit of the cap I find very good (the stick has its home in your wallet) and the stick is so small that it similar to the netbook does not interfere, but is also good deducted. For me, a perfect and inexpensive solution.