Instead of waiting forever to save up for 256 gb, I got a 16 gb SD card at Walgreens on sale for $16.19. It's a Sandisk 98 speed, I guess. I put it in the S5, which was pretty easy since it's currently backless, but the phone evidently doesn't recognize it. I shut it off first and then switched it back on, with no message about it. Then I looked under storage, which still didn't show it. I shut it down and put it back on again, but still nothing. I'm pretty sure I installed it the right way, contacts face down and at the top, after I took out the battery. What should I do, besides save the packaging and receipt?