Hi, I have a Samsung Galaxy J5 and I use an SD card in it to store my photos and music, etc. I'm finding that any pictures or videos I saved (from sites, that I took myself, etc.) since the 4th of April aren't working properly. The thumbnail will show up in my gallery but when I try to view it properly, it doesn't let me view it. I tried to move the pictures onto my computer but it won't show up properly or send them across. I tried moving one of these 'broken' pictures but it broke even more. I moved one of the pictures from my SD card back to my device and then the thumbnail didn't even show up in the gallery. I'm really confused. I often go through my phone to delete unwanted items so I'm scared that I may have deleted something that caused this to happen.. Please help asap !!!