I was just looking for some options to backup your personal data and this is a very short summary of what I came across:
Special companies like www.crashplan.com
Free companies like bitcasa.com 10Gb
Cloud platforms like:
Microsoft Skydrive 7 gb free
Google Drive 15gb free
Apple Icloud 5gb free
Dropbox 2gb free
Own hosting solutions like owncloud www.owncloud.org
I must say I installed and tried owncloud just for fun, but it is working very well.
You just have to be sure your hosting company accepts this kind of behaviour in your terms of service.
Hope it helps