Unfortunately I have been dissappointed with this product. It looks so amazingly slick and is tiny and light that you may fear you lose it or throwing it in your bag could damage (there is not bag or protective cover delivered with it).
Though on various computers of mine it does not work (eg. on older system like at work) and the most important one for which I needed it was my Galaxy Tab 10.1 - which does not recognise the USB file system!
On my laptop it does seem to work but only on and off! When it overheats, or not sure why yet, it just pops in and out of the systems 'awareness' e.g. large datafile transfers got constantly interrupted which wasted already one whole day for me.
Not happy with it - I now have to buy a different one.