This is the 2nd Ultra Sandisk that has crashed and all of my very important pictures and videos seem to be gone. I'm besides myself, please help! It is my daughter's performances in what would be her last. I'm so upset about this as another sandisk did the same thing--after it working for a few months just said, error corrupted or whatever and it stops. I tried uploading the pictures to the computer but it wants me to FORMAT it , but I've been warned that formatting erases everything on there.