@nayan007 wrote:
If not, return it to where you bought it or contact SanDisk directly for a replacement under their 1-year warranty.
Whoa, hold on there Bucky! 
The OP said this was a re-furb bought from Tiger Direct with only a 30 day warranty , and that he has already had them 2 months. SanDisk only warranties new products, _ not _ re-furbs, so he’s out of luck.
If the reset doesn’t work, and I don’t think that it will, updating the firmware will do nothing either.
