The Synology M2D20 M.2 Adapter Card is a high-performance PCIe 3.0 x8 expansion card designed to accelerate NAS I/O performance by adding dual M.2 2280/22110 NVMe SSD slots for SSD caching. This low-profile/full-height adapter card enables you to create a high-speed SSD cache without occupying valuable 2.5" drive bays, keeping all primary bays available for data storage. Leveraging the multi-queue capability of NVMe technology, the M2D20 dramatically improves performance for latency-sensitive applications including photo indexing, file search, database operations, and virtualization deployments. Compatible with a wide range of Synology RackStation and DiskStation models including SA, RS, and DS series (18 series and newer), this adapter card pairs perfectly with Synology SNV3000 and SNV5400 Series NVMe SSDs to deliver enterprise-grade cache acceleration, making it an ideal upgrade for existing storage infrastructure seeking enhanced random I/O performance, backed by a 5-year warranty.