Its been fine up till now which is only a week lol but I starting using the video and filming today and since then it keeps coming up every now and then that the card is unmounting and then preparing the card?? I just took it out and blew in to the slot to make sure its clean and 5 mins later it did it again. Dodgy phone?? Card was fine in the S3. Should I use the 'format card' option??