You can create an instance to copy selected disks of a VM to store as a VM template. In private cloud with hypervisors, the platform saves the disks and a copy of the original template definition, unless the VM was captured from outside Abiquo, in which case it saves the configuration of the VM. The platform stores the instance under the master template in the Apps library. In public cloud providers, the platform saves the instance as a new VM template with disks and the configuration of the VM. Remember to enter a name that will help you to identify the instance template.
In the platform, hard disks are non-persistent and they are destroyed when deleted from the VMs or when the VMs are undeployed. In private cloud datacenters with hypervisors, the platform creates hard disks on the hypervisor datastore.
In contrast, volumes are persistent and independent of VMs. The platform creates volumes on external storage. Volumes are available in public cloud providers and they represent public cloud storage such as Azure Managed Disks.