My daughter needed a replacement MP3 player and when the store did not have the one we wanted, she picked this one. It charged within 3 hrs like the directions said, then we loaded her songs, and within the first 15 minutes of play, the unit shut down and none of the buttons would work!! We tried to reset it but nothing happened. I tried to see if we needed to download the "firmware" from their website (following instructions in the book) but the file format was something that I had to buy!! So my husband brought it back to the store, we got a replacement of the same item....went through the whole...