The DS1823xs+ keeps the same caching-only M.2 policy

Synology doesn’t budge on the DS1823xs+: eight SATA bays for your data, two M.2 slots for cache only. The caching helps with metadata-heavy workloads, but you won’t be running NVMe storage pools here. Standard 3.5-inch or 2.5-inch SATA drives are your only real storage option.