Good backups are more than copying files. They are a planned system that keeps your data safe and always restorable.
The golden rule
Best practice says to keep three copies of your data on at least two different kinds of storage, with one copy in a separate place, to spread the risk.
Practical principles
- Keep more than one copy in several places.
- Test restoring regularly, not just copying.
- Encrypt sensitive backups to protect them.
- Write down what is copied, when, and where it is kept.