Discusses a potential data loss issue with Backup
Backup 3 performs incremental backups, backing up only files that have changed since your last backup. This also occurs if you are backing up to a CD-RW or DVD±RW.
If you performed a backup to a CD-RW or DVD±RW, and later wish to backup changes that have occurred in your backup set to the same disc, you should do another Full Backup, rather than a normal backup. Doing a normal backup may lead to you inadvertently not having a back up any files in your back up set that have no changed.
To perform a full backup, select Plan > Full Backup.