To create and manage storage policies for your virtual machines, you use the VM Storage Policies interface of the vSphere Web Client.
After the VM Storage Policies interface is populated with the appropriate data, you can start creating your storage policies. When you create a storage policy, you define placement and data service rules. The rules are the basic element of the VM storage policy. Within the policy, the rules are grouped in collections of rules, or rule sets.
In certain cases, you can prepackage the rules in storage policy components. The components are modular building blocks that you define in advance and can reference in multiple storage policies.
After you create the storage policy, you can edit or clone it, or delete any unused policies.