WD’s My Cloud outage harshly reiterates the ‘backup rule of three’ | PCWorld
If you’ve been hit by this service disruption, you’re likely riding it out in one of two ways: frustratingly cut off from your files, or temporarily inconvenienced because your data isn’t readily available in the cloud. The difference? In the first scenario, My Cloud’s your only location for your data. In the second, you were following the rule of three.