On the Backup plans page, choose the backup plan that you want to delete. This takes you to the details page for that backup.
To delete the resource assignments for your plan, choose the radio button next to the assignment name, and then choose Delete.
To delete the backup plan, choose Delete in the upper-right corner of the page.
On the confirmation page, enter the plan name, and choose Delete plan.
Delete the Recovery Points
Next, you can delete the backup recovery points that are in your backup vault.
To delete the recovery points
On the AWS Backup console, in the navigation pane, choose Backup vaults.
On the Backup vaults page, choose the backup vault where you stored the backups.
Choose the recovery points and delete them one by one.
Delete the Backup Vault
You can’t delete the default backup vault in AWS Backup. However, if you created a different backup vault, empty the backup vault by deleting the backups. Then select the backup vault and choose Delete.