Seeing Huge Amount of Data Usage with Google Music I have recently purchased the Galaxy Nexus, and I am extremely happy with it. As part of that purchase, I decided to bring all my music into Google Music. So, I've been using Google Music on my way into and home from work (about an hour total a day) and I am seeing a huge amount of data usage from Google Music. (Everything else combined doesn't come close to what it uses.)

Here is a screenshot of my data management window:



Why is this happening? Is there anything I can do to prevent it from heavily using data like it is?
OK, I think the answer to your question is that Pandora's stream is never more than 64 kbps for mobile devices, whereas Google Music uses 320 kbps MP3s and there's no downsampling.  That's 5 times the amount of data, assuming Pandora doesn't use a better format than MP3.

Since Google Music transcodes your files, I don't think you have much of an option here.