The primary function of cloud storage services is to provide scalable and accessible data storage solutions over the internet. These services enable users to store, manage, and share files without relying on physical hardware. Key benefits include flexibility, allowing users to increase storage capacity as needed, and improved collaboration through easy file sharing and syncing across devices. Additionally, cloud storage enhances data security by offering backup solutions and protection against data loss. Overall, it simplifies data management by offering convenience and remote accessibility.