I'm working on a computer science discussion question and need an explanation and answer to help me learn.

Experts recommend the 3-2-1 method for backing up data, both professionally and personal data as well. This is three copies of your data, on two different devices, and one off-site.

• Why is it important to back up my data?
• It is mandatory for businesses to back up their data?
• What can we do personally to meet the 3-2-1 methodology?