Ok, a complete nube question. Please have mercy. I am using a galaxy s4 running 4.4.2. I have been trying to move files onto and around my external sd card, with a file manager (mainly "File Manager"), but unsuccessfully. I get a message that "following files have not been pasted". I went to the trouble of backing up and reformatting the card, but I still have the same problem. Any suggestions. Is it something painfully obvious that anyone who knows anything should know about?