synthetic full backup
Synthetic Full Backup, or SFB, is a backup for Windows Client Agents that is executed as part of a Normal backup with staging option, Deduplication backup with staging option, or Deduplication backup that synthesizes, or combines, an initial full session and its subsequent incremental backups into one session. Each synthetic full session becomes the parent full session for the next SFB job (unless a real full backup session is executed after the SFB session).