I am planning on purchasing the Galaxy S6 but am concerned about the storage. I store a pretty decent amount of music on my S5(over 2500 songs) using an SD card. But, since there is no expandable storage on the S6, I am wondering what the best choice would be, either to get the 64GB or 128GB device or if there is a cloud storing app that I can use to store my music there without using up my device storage?