EC2 instance tag and defaults
The EC2 stack backup tag specifies whether the stack requires a snapshot of the attached EBS volumes or not.
Tag Key: Backup
Tag Value: True, False
By default, the value is False the backup tag is not present, and the stack does not have scheduled backups.
Change the tag Key: Backup to Value: True to enable backups, which are then done on the schedule set with the VPC backup tag.
Note
The casing for the tag value (Value only) is insensitive, so True/true or False/false are all acceptable.