Maximum PC: We all know how useful cloud storage is for easy access to all your files from any Internet-enabled location, but there’s also an equally killer service known as cloud backup. It lets you back up files to a remote server for retrieval after a disaster strikes, such as a failed hard drive, Hurricane Sandy, an apartment fire, or any other calamity that leaves your PC’s local storage permanently damaged. It’s in these scenarios that the mirrored RAID inside your home PC or sitting on your desktop will be about as valuable as Jack Squat. When your home PC, or town, goes bye-bye, you need offsite backup, so this month we’ve taken a look at two of the most popular services that offer unlimited backups for a modest sum. May the best cloud win.