Whenever the US promises you that your data are "secure" with their tech, remind yourself of this story:

https://www.eff.org/deeplinks/2014/01/after-nsa-backdoors-se...

https://en.wikipedia.org/wiki/CLOUD_Act

Ok smarty-pants. Explain exactly how the encrypted cloud backup leaks to NSA when the key to decrypt it sits on your device and safe alone?