Originally Posted by androidtweaker1
Try formatting the SD and using it after that
I tried that. At first the problem still occured. Then I saw, that ES File Explorer showed the message, that it is unable to copy the picture "IMG20140910_0815:nopm:.jpg.
I was confused why some pictures of the DCIM folder have an :nopm: in the name, so I tried to move all other pictures insted of the nopm ones to the external sd card.... worked. The next step I did is to rename the nopm pictures to delete the :nopm: tag out of the name. After that, I was also allowed to move this pictures to the external card. Problem solved.
Another little question: Do you know if it's possible to create a link from the internal DCIM folder to the external one? The google camera app dont have an option to choose where the pictures should be saved, so this link would be a workaround solution.
Thanks for your help