Capital expenditures (CapEx) refer to major purchases that are expected to provide long-term benefits, while operating expenses (OpEx) are ongoing costs related to running normal business operations. Some key differences are that CapEx purchases can include buildings and equipment that are depreciated over time, while OpEx are fully deductible in the year they are incurred. Storage-as-a-service provides an alternative to traditional storage infrastructure by allowing companies to pay an ongoing monthly fee for cloud storage rather than making large up-front CapEx purchases. This reduces costs and provides benefits like automation, accessibility, and data protection compared to maintaining an on-site storage system.