Greg_Z
I just don't get what has happened to SanDisk quality.  It seems to have gone down over the years.  This product was glitchy from day one.  I thought it would be fine after a quick check disk, but then it only got worse.  After less than a week I have to return it.  What upsets me is that this is not my first bad experience with SanDisk products.  I used to buy them all the time, they were my brand of choice for flash memory (cards or thumb drives).  The last three products I have bought from them have had problems and failed either immediately or shortly after usage.  So I give up.  I will start looking to other companies for my memory needs.  I bought a Transcend to replace this.  I hope it works out better.