Mac OS X Lion
Time Machine is a great feature in Mac OS X that gets better with Lion. It lets you back up your entire system (documents, photos, system files, etc.), and it’s easy to restore files by going back in time. The first time you connect a hard drive to your Mac, it will ask you if you want to use it as a backup drive with Time Machine. Time Machine also works seamlessly with Apple’s Time Capsule, a combination wireless network drive and 802.11n base station.
Now with Lion, Time Machine keeps a spare copy of the things you create or modify while you’re away from your backup drive or Time Capsule. That way if you delete something accidentally, you can easily recover it later. Lion also offers encrypted backups with FileVault 2.
Safeguarding precious files and folders is a cinch with Windows 7. You just launch Backup and Restore, then choose a destination for the backup. The straightforward interface guides you through the rest of the process, including deciding whether you want to let Windows 7 choose what to back up on a regular schedule or choosing the files or folders yourself. Too bad backing up to a network is only available to Windows 7 Professional and Ultimate users.
A separate System Restore feature in Windows 7 helps restore your PC’s system files to an earlier point in time should your system start to misbehave. It will help you undo system changes without touching your files. The OS regularly creates restore points, but you can also do so manually.
By combining file and system backups in a single program, Lion makes things easier. The OS makes things even simpler by inviting users to back up via Time Machine when connecting an external drive.