Attaching a New Volume to an Existing Instance
After you create one or more volumes, you can attach them to instances. A volume can only be attached to one instance at a time.
To attach a volume to an instance, navigate to the Volumes & Snapshots tab. Select the volume you wish to attach and hit the Attach Volume button in the action ribbon.
On the Available Instances dialog, select the instance you want to add the volume to.
Select ATTACH VOLUME and you will see the status of the task on the Volumes & Snapshots overview.