Can malware get onto my backup?

Episode 1623 (2:06:55)

Martin from Hayward, WI
Malware Types

Martin has a backup running on his computer all the time, and he's worried that malware can get onto it. Leo says that current malware is "wormable" and can actually take advantage of Microsoft's networking, spreading through the network. It's called "eternal blue." So if you have hot storage that's online and current, you have to treat it as vulnerable. The only real good backup is a disconnectable backup.