files automatically deleted in sd card

When you say they are automatically erasing themselves, do you mean you see them there on the SD card and sometime later they go missing? Or do you mean that you move them there and you can't see them at all?

 

There is a free app in the Play Store called SD Insight that you can get to test your SD card. There has been a lot of counterfeit cards lately. Could be that the card you have has less capacity than the advertised 32gb.