I bought a samsung 64 gb microsd card from amazon, its the one with blue lettering. well way too many video problems with this card. movies copies to it no matter what resolution or format fail. some fail imediatly others fail after a few seconds. the card workd well if i take it out and plug it into a PC everything works fine.. so wierdness here with these cards. I used a 32gb scandisk card and had ZERO problems. I searched the forums and found this is a known problem. after contacting samsung, they said it was most likley the sd card but failed to provide a new one stating it works on PC so too bad so sad at this stage. just wondering if others here have had this problem and what you have tryed or such to fix it....