I have a Samsung galaxy core , I have had it for a month. I got an SD card 16gb a week ago, moved all apps that could be moved, saved photos to the SD card, everything was working great. Then yesterday I pick up my phone and my phone keeps saying removed Sd card and then it would say preparing sd card over and over again. I took out and put the card back in over and over rebooted. Then I too it out put in a 32gb sd card class 10. That message went away buy every app I try to put on it everyone I try to open it says unexpectedly stopped working. When I go to my files it says there is 224 files of weird symbol and foriegn language files that I cannot open or delete. My device storage is full, if I can't have an SD card then I can't really use app, photos, music, or my phone at all