An incremental backup is a type of backup that only copies the files that have changed since the last backup was made. This means that after a full backup, subsequent incremental backups will only include the data that has been altered or newly created since the previous backup, making it a more efficient way to save storage space and reduce backup time.

References = While I can’t provide direct references from the Cybersecurity Audit Manual, the concept of incremental backups is a standard practice in data management and is covered in various cybersecurity and IT audit resources, including those provided by ISACA1. For a detailed understanding, you may refer to the ISACA Cybersecurity Audit Certificate resources or other ISACA study materials.