Oops. Looks like I overlooked two other favorites for online storage and backup. Carbonite and Mozy are two of the excellent and popular back up services available. Mozy offers 2GB for free and unlimited storage for $4.94 / month. Carbonite offers unlimited storage for $50 / year. Again, a small price to pay for data insurance. Automatic backup service from both Mozy and Carbonite are available for PCs. Carbonite's Mac support is forthcoming.
From:Lifehacker: Online Backup Final Round, Mozy vs. Carbonite
