A popular rule for determining how to protect your important data is the 3-2-1 Rule. The rule is used as a guideline to determine how many copies to store, what to store them on, and where to store them to ensure maximum protection for your enterprise.
At its core, the rule is:
Store Three Copies of any important data.
On Two types of media (disk and cloud, for example)
With One of those copies off site.
By following this guideline, you can ensure that you are able to recover from almost any disaster, without data loss.