A Synology-branded enterprise/NAS‑grade NVMe SSD aimed especially at use in Synology NAS systems, including as cache or even as a primary SSD volume where supported. It comes in 400 GB (SNV3410‑400G) and 800 GB variants. Form factor: M.2 2280, Interface: PCIe 3.0 ×4 NVMe

Main advantages

1. High performance for caching

   • Very high random I/O (4K) performance (reads/writes), which helps especially with small file operations, metadata, directory listings etc.

   • Good sequential read/write speeds which help with large file transfers when the SSD is used for more than just caching.

2. High endurance and reliability

   • The 800 GB version has about 1,022 TBW (terabytes written) endurance.

   • The 400 GB version has ~ 491 TBW.

   • MTBF (Mean Time Between Failures) is ~1.8 million hours.

3. Built for 24/7 NAS workloads

   • Designed to handle continuous usage and caching in multi-user, always-on NAS environments.

   • Integration with Synology DSM gives monitoring, alerts, firmware updates—all of which help maintain long‑term reliability.

4. Optimized compatibility with Synology NAS devices

   • Because it’s a Synology‑branded SSD, compatibility, firmware, validation etc are more assured, especially for functions like SSD caching, read/write operations, etc.

   • Using the same brand helps with DSM managing drive health, workload analytics etc.

5. Space saving

   • Use of the M.2 form factor means you keep the 3.5‑inch or 2.5‑inch bays free for storage HDDs or larger SSDs. Good for maximizing storage capacity.

6. Warranty / Support

   • Comes with a 5‑year limited warranty from Synology

7. Good power / thermal profile

   • Acceptable idle power consumption; will use more under load but typical for NVMe SSDs in this class.

   • Operating temp range is wide enough for reasonable NAS enclosures.

Best use cases

• As a cache SSD in a Synology NAS (read/write cache), especially with many users or frequent random access. Speeds up metadata and frequently accessed files.

• As a volume SSD in NAS models that allow SSDs to be used directly as storage (if you need speed, e.g. for database containers, VMs, or fast file serving).

• In situations where you want long‑term reliability and monitoring — the integration with DSM gives good diagnostics and firmware updates.