This may be too late, I went to the my files and clicked on on internal SD and went to files the I wanted on my external SD card, checked them and copied to the clip board in the right top corner. Then, went to the external SD card file and pasted them . in my case I moved music and pics over to the external. After it was succesfuly copied over, I went over to the external SD file and seen if everything I wanted to be there was there. After confirming it went OK I went over to the internal SD and erased what I transferred. The last step is went to my files again from the start clicked on the left (don't matter which one) on the external SD, then went to the menu on top right corner clicked settings and scrolled down to click "set music directory to" the chose external SD. Repeat as necessary, if this is redundant forgive me for being late.