Block Storage
File Storage
Object Storage(s3)
By default, an EBS volume can only be attached to one instance at a time. However, AWS does provide options for multi-instance access under specific conditions.
Go to Actions,click Instance Settings,click Change Termination Protection
Select Enable and Save
AWS does not allow cancellations or refunds for Reserved Instances. You are still responsible for paying the full reservation period. the reserved pricing remains available for any new instance of the same type in the same region.