I'm getting a note 4 for my wife and have a question about a memory card for it. The phone comes with enough memory for most anything she ever would ever do with it as she won't have a ton of multimedia files and such. My question is this. I am thinking about giving her the 32 GB card that is in my Note 2. The thing is its only class 4. I know the write speed to and from the card wouldn't be as fast as possible but being such a lower class card on such a new phone is there any reason it wouldn't work or be problematic?