If you want to back up your computer or your gmail data or your facebook data now you have can do an online backup and access it anywhere.
www.sugarsync.com – with this you can back up your hard disk and access it online. There is a 2 GB free plan and for higher requirement you need to subscribe to their monthly service. they charge $5 for 30 GB per month.
www.backupify.com takes regular backup of your all social media data and also of your gmails. They also have a 2 GB free plan.