3 Things to Know About the Synology DS423+ Drive Setup

Main storage uses SATA drives The DS423+ supports 3.5-inch and 2.5-inch SATA hard drives and SSDs for primary storage.

M.2 NVMe slots are cache-only The two M.2 NVMe slots handle caching only and won’t appear as storage pools in DSM.

This is standard for Synology It’s a consistent design choice across Synology’s lineup, not a limitation unique to this model.