My Galaxy 7.0 Plus does not recognize my sd card all the time. At first I thought it was a fluke. I took at out card verified info was still there put it back in and nothing happened. Then hours later it just appeared. The other day I added more to card and put it back into tab and nothing appeared. but hours later it was there. Does it take a while to read? Anyone else have issues with SD Storage appearing and dissappearing?