I recently bought a Galaxy Tab A, 8". It read the SD card ok initially. I moved some apps to the SD card later. When I turned off the Tab A and turned it back on, I noticed that the apps on the SD card were greyed out. I could still read the SDCard though through file manager. I unmounted and mounted the SDcard. The apps, later, came back by themselves although I don't understand how that happended. Not sure if I should return the Tab A or not.....anyone have any ideas.