Reading through the caveat page [1], it seems the marketing copy is not quite in line with reality in terms of ability to scale down directly:
> Decreasing the size of an EBS volume is not supported. However, you can create a smaller volume and then migrate your data to it using application-level tools such as robocopy.
> Decreasing the size of an EBS volume is not supported. However, you can create a smaller volume and then migrate your data to it using application-level tools such as robocopy.
[1] - https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/consider...