I have bought the stick relatively precipitously because my DELL (WIN 7) must be repaired. Previously, of course had the data to back up. My external hard drive from MYDRIVE was not recognized, no matter what I did. But for that I still write a separate review. Stick was via Premium shipping the next day there, exactly 1 hour before collection of the notebook. And what can I say? Immediately recognized draufgezogen all about 12GB, went jiffy, and parts thereof from the stick on my MAC, MAC also recognized him immediately. I can say much more efficient than an external drive only if one makes do with 15 GB (of course, are not the whole 16 GB free). For the optics does not really matter: Pretty small, smaller than a Labello, awesome the screw cap, you can lose no more cap. Is incidentally also backward compatible to USB 1.0, funzt also in my third, ancient notebook. Thoroughly recommended. The only drawback, as always in these parts: Packing: Had a lot of power with the tiresome welding-cut to get their hands on all of the part. Too much plastic for such a small part. There's a star deduction.