As you may be aware Google Music allows user to both buy music but also upload any music files they already have to their Google account. This means you can then listen to your music from any device or browser, with the added ability to cache or ‘pin’ content locally so you don’t rinse your mobile data limit.
Google has now increased the limit of uploadable songs from 10,000 to 50,000 so all of you with huge music collections can now really listen to all of your music anywhere you go on any device!