ngvaynshtok
works perfectly well with my Galaxy s4! before use, i put the micro sd card into the adapter and put it into my laptop, connected my phone to my laptop, transfered all my stuff from one sd card to the other, and it worked well, i still have all my stuff... with PLENTY of room to spare... and now with the S4 you can save your apps onto ur sd card, so whatever i can save on my sd card instead of the actual phone memory, i save... now both have a lot of free memory =] very happy with this purchase. have had it for a while now.