Space in a NAS storage device may be allocated to multiple departments.

The correct feature is multi-tenant. In NAS storage, different departments may need to share the same physical storage system while keeping their resources, permissions, and data logically isolated. Multi-tenancy allows one storage system to be divided into independent tenant environments. Each tenant can have separate users, access policies, namespaces, and management boundaries. This avoids mutual interference because one department’s operations are isolated from another department’s services. It also improves data security because departments cannot freely access each other’s data unless permissions are explicitly configured. Management is simplified because administrators can allocate and control resources by tenant. Quota controls capacity usage but does not fully isolate departments. WORM protects data from modification, and security audit records operations. Therefore, multi-tenant is the best answer.