When architecting a storage infrastructure environment on-premises for enterprise-level workloads, you have to make a number of predictions to figure out how much storage space and server resources will wind up being used. In the cloud’s opex model, it just takes a few clicks to order additional storage and add some more IOPS to bump up your QoS. The cloud makes it possible to start small and grow as needed. Costs that start small will grow along with the need for more storage. Read our article of On-Premises Vs. Cloud: The Cost Comparison