How to create an immutable policy for your Amazon S3 bucket?

How to create an immutable policy for your Amazon S3 bucket?

1. In the AWS management console. Enter "iam" in the search bar.
2. On the [IAM] “Manage access to AWS resources” tile. Click on [Policies].
3. Click on [Create Policy].
4. In the Policy editor click on the [JSON] option.
5. To prepare the policy script, replace all instances of [BucketName] with your own bucket name.
6. Copy and Paste your custom script into the Policy Editor.
7. Click on [Next] to continue.
8. Enter the Policy name.
9. Click on [Create Policy].
10. The Policy created.