I want to get extra storage in my instance by expanding the EBS root volume. Will this cost me extra? and by how much?
>Solution :
You will pay for the additional storage allocated. For example, if you expand a gp3 volume from 100GB to 150GB it represents an additional monthly cost of:
$0.08/GB-month * 50GB = $4
according to current pricing.
It could vary depending on the type of volume or things like provisioned IOPS, snapshots, etc.