Amazon is now offering a cloud solution. 5GB space for free and works on both Mac and PC. 20 GB for $20 a year and 50GB for $50 a year. They keep going up levels with 1GB=$1 up to 1000GB for $1000 a year.
Here is the link to Amazon’s cloud service: https://www.amazon.com/clouddrive/learnmore
See my breakdown of all cloud services: http://raypastore.com/wordpress/2012/04/cloud-storage-options-which-is-best/