Applies to NetApp Keystone Services Description Keystone is our pay-as-you-grow, storage-as-a-service (STaaS) offering that delivers a seamless hybrid cloud experience for those preferring OPEX consum...Applies to NetApp Keystone Services Description Keystone is our pay-as-you-grow, storage-as-a-service (STaaS) offering that delivers a seamless hybrid cloud experience for those preferring OPEX consumption models to upfront CAPEX or leasing.