The rule of thumb for backup is min. 3 copies and at least 1 of thoes that is off site.
And a raid does not count as a backup as others have stated, that’s just redundancy for 1 copy to keep you going really… good for a NAS (1 copy), then your working PC (2nd copy) and a off site copy (makes 3). Optimally one is a cold storage ie. not connected unless backing up to it, which can be the off site or 4th copy.
The rule of thumb for backup is min. 3 copies and at least 1 of thoes that is off site.
And a raid does not count as a backup as others have stated, that’s just redundancy for 1 copy to keep you going really… good for a NAS (1 copy), then your working PC (2nd copy) and a off site copy (makes 3). Optimally one is a cold storage ie. not connected unless backing up to it, which can be the off site or 4th copy.
Then you should hopefully be safe!