Abstract: A backup device and a one-key data backup method for the same use a backup device having ability to retrieve a memory card and an optical disc. The backup device is connected to an external computer. A backup application is installed having backup conditions configured in the external computer. When an input unit of the backup device is triggered, the backup device sends a backup request instruction to the external computer. The external computer executes the backup application upon receiving the backup request instruction, and records data of the memory card to an optical disc, or saves the data of the optical disc in the memory card based on configured backup conditions.