For a customer seeking a centralized file-sharing solution that also provides print services and 15TB of storage, the ideal recommendation is NAS (Network Attached Storage).
NAS systems are specifically designed for file sharing and often come with integrated print server capabilities. They provide centralized storage that can be accessed by multiple clients over a network, making them suitable for environments requiring both file sharing and print services. NAS devices are scalable, making it easy to add additional storage capacity as needed, and they support a variety of file-sharing protocols, ensuring compatibility with different client operating systems.
Reference:
HPE NAS Solutions
HPE Storage Overview