I have the 32 GB version of that SanDisk card and it works great on my Motorola Droid 3. I should be getting my SGS4 today. Do I need to reformat the card or will the S4 recognize the file structure/format of the card that I had on my D3? I'd of course would like to not have to copy my 20+ GB of multimedia files to my PC, have the S4 reformat the card, and then copy the files back onto it. TIA.