Sorry, but the cloud is great with common sense because it makes things readily available anywhere on any device. Just use common sense and a hybrid approach.
1. If private in nature and you wouldn’t want anyone to see it then don’t put it on cloud.
2. If desired, make a local copy of anything you don’t mind being on the cloud, but that you want to maintain control over (for email this can be done with .pst files etc.).
The cloud is great, but only part of an overall solution to data availability.
I’ve look at cloud computing from both sides now,
From up and down, and still, somehow,
It’s cloud-computing’s illusions I recall,
I really don’t know cloud-computing at all.
I agree with this. If it's important, store it on a Storage HD. They aren't forcing you to only use the cloud.