Yes. I have same problem. I bought a brand new SanDisk ultra high speed class 10 certified for Android device. At time all my picture and music file just disappear. Note 2 pop out a message sd card damaged. But a while later all file will came back. I reformatted the card. Still same problem. I thought I got a damage card. Bought a new one Also same problem. My wife having note 2 with 64gb no problem. Think it's the phone issue.