SugarSync

SugarSync offers many interesting features. It had got a nice interface and will let you to backup, access, sync and share all of your documents, photos, music and movies very easily so that you can access them from anywhere.  It has some components like Dropbox and has features like auto-uploading the pictures taken in your phone to the cloud.It supports almost all platforms.

It comes with 5GB free storage and for extra space, you will have to pay $50 a year for 30 GB.