What's the best backup option for multiple copies of the same file?

Episode 959 (15:23)

Paul from San Diego, CA

Paul is looking for software to allow him to backup each version of what he's working on. Leo says that's called "versioning." Windows 7 has versioning, called "Shadow Copy." He can enable it in his settings, inside System Properties Control Panel. He should look for a System Protection Tab, and enable Shadow Copy. It'll copy to a portion to the local hard drive that he can then backup.

There are several third party programs that can also accomplish this:

Here's a list of the top 5 best free windows backup programs.