I've just plugged and play on my Galaxy S3.It is very cheap for extra 64 Gb. (If you want the same on an i-phone, you'll pay US$ 100 per 16 Gb, with a 2 year contract with your carrier).I do not remember the last time I downloaded the pictures to my PC...I took hundreds of 8MP pictures and a bunch of full HD videos, I have around 30.000 mp3 and I still have space.I just love it!