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It is important to understand that backing up is a process.

As long as new data is being created and changes are being made, backups will need to be updated.

Individuals and organizations with anything from one computer to thousands ( or even millions ) of computer systems all have requirements for protecting data.

While the scale is different, the objectives and limitations are essentially the same.

Likewise, those who perform backups need to know to what extent they were successful, regardless of scale.