What typically happens during a data backup?

During a data backup, the primary objective is to create a copy of data to prevent loss, making option B the correct choice. This process involves copying files, databases, and other digital information from a primary location to a secondary storage system or device. The intent is to safeguard this data against potential threats such as hardware failure, accidental deletion, or data corruption.

When data is archived, it is often stored in a different location, allowing for both preservation and easier retrieval in the event of data loss. This practice is essential for any organization that values its information, ensuring that vital records are not permanently lost.

The other options may represent misconceptions about data backup. Files are not deleted in this process; instead, the backup ensures their retention. Additionally, while it may be true that backups can temporarily affect system performance due to resource usage, this is not a defining characteristic of backups themselves. Lastly, backups generally include critical data, and it is not standard practice to limit backups to only non-critical files. Therefore, option B accurately captures the essence of what happens during a data backup.