I have an LG Aristo 3. I use a 16 GB SD Card in it. And about a week ago I noticed I could no longer take pictures that would save to the SD Card, but could to Internal Storage. Also, I then realized I could not move items in my Gallery to different Albums that were a part of the SD Card. Then, I saw it was full so I proceeded to delete some files and pictures. But even with that (I deleted hundreds of old pictures I didn't need anymore in the Gallery) the SD Card shows that its full, I can't move pictures, save pictures to SD Card and when I tried to delete files in the File Manager I was not able to. It just says "Could not delete files." Why is this happening?