Amazon has just launched a free cloud storage service called Cloud Drive along with Cloud Player that allows customers to use Amazon’s online storage service to stream music to any desktop computer and/or mobile device.
The free plan gives you 5 GB of space and you can use it to save any files. Additional storage space is available starting at $20 per year for 20 GB of space. Cloud Player is a web based media player, which is also available for Android, that lets you stream music from your online library to anywhere. Bandwidth is unlimited.
When you purchase songs or albums from the Amazon MP3 Store you can have them saved to your cloud storage so that you can listen to your music from any web-connected computer with Amazon Cloud Player. The best part is, when you save your Amazon MP3 Store purchases directly to your Cloud Drive, they don't count towards your storage space and are always stored for free.
Additionally, when you purchase an album from the Amazon MP3 Store you get 20 GB of storage free of charge for one year from the date of your purchase.
As far as storage is concerned, you are free to store any files on it. If you intend on using the Cloud Player for streaming the music you save must be either MP3 or AAC files and they must also be DRM-free.
Unfortunately, this service is only available for US uses for now.