Backup file created by versions 7 and 8 of NovaBACKUP, a backup application for Windows; saves all the backed up user and system files; has a file size limit that is set by the "Data Chunking" size selected within the application's Global Settings → Devices preference window.

Important: NovaBACKUP version 10 introduced the newer .NBD format for backups, and NB7 files can be upgraded to this newer format.