3 Things to Know About the Synology DS1520+ NVMe Slots

The two M.2 slots are for cache only Synology does not allow using NVMe drives as storage volumes on the DS1520+. They only accelerate read and write operations for your existing SATA drives.

The five drive bays accept any mix of 3.5-inch and 2.5-inch SATA drives All storage must go through these SATA bays. There is no way to use the M.2 slots for expandable storage.

The NVMe cache improves speed but has limits While the cache can boost performance for frequently accessed data, it does not increase total storage capacity. Treat it as a performance feature, not a storage upgrade.