Now copying encrypted Amazon EBS snapshots under custom CMK can get copied faster with less storage

You can now make a new copy of Elastic Block Store snapshot where only the modified snapshots will be saved in the new copy. So this will reduce the time take to copy the Elastic Block Store snapshots and it also reduces the storage cost by not duplicated data for EBS snapshots that are encrypted with the custom CMK. You don’t have to make any changes to avail this feature. You can use the copy snapshot API as you can normally do for making the Elastic Block Store snapshots. This will result in EBS snapshots incremental if there is already a similar copy of the EBS snapshots encrypted under the same Customer Managed key in the destination region or account.