Best M.2 NVMe for the Synology DiskStation DS423+
By Devin Chua · Data checked by Owen Nakamura · Updated · Prices checked The DS423+'s 2 M.2 slots take 2280 NVMe drives, and Synology's compatibility list for it names only its own SNV3400, SNV3410 and SNV5420 drives, which Synology requires for both cache and storage pools. Whether a cache pays off depends on the 2 × 1GbE link and on whether you re-read the same data; for a media library streamed once, it does not.
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M.2 NVMe for the DS423+, from Amazon.ca
| Model | Capacity | Price | |
|---|---|---|---|
 Synology SNV3410 400GB M.2 2280 NVMe PCIe 3x4 SSDNew On Synology's M.2 compatibility list for the DS423+ Amazon.ca · sold by MaxSalesFr · one bare SSD; shipping and taxes not included · checked Oct 15, 2026CA$941Buy on Amazon | 0.4 TB | CA$941 | Buy on Amazon |
Fits physically, not on Synology’s list
not on Synology's M.2 compatibility list for this model, which Synology requires for cache and pools These are shown for reference, not as picks.
Fit not confirmed by Synology
We could not confirm these against Synology’s published specifications: the listing does not state the M.2 length. Check them against your unit before buying; they are not counted as compatible.
Left out as not fitting the DS423+: 2 listings (M.2 2230).
Cache or a fast pool on the DS423+?
The DS423+'s 2 M.2 slots take 2280 NVMe drives, and Synology's compatibility list for it names only its own SNV3400, SNV3410 and SNV5420 drives, which Synology requires for both cache and storage pools. A cache only speeds up data you read more than once: on the DS423+, a media library streamed through once gains nothing, while repeated project files, photo libraries or container images show the difference immediately. Weigh that against its 2 × 1GbE link, which is often the real limit.
Budget for that list when you plan a cache or a pool: on the DS423+ it is the one place Synology still enforces a drive list, and the drives on it cost more per TB than consumer NVMe.
Drive policy: Synology's 2025 drive policy applies only to models launched from 2025, so the DS423+ takes third-party hard drives and 2.5-inch SATA SSDs as it always has. The DS423+’s full compatibility rules.
Keep calculating
To see how much capacity is left after parity, the DS423+ capacity calculator is preset to its 4 bays and RAID types. For the DS423+, the wider basics of choosing a drive are in the buying guides, and CMR versus SMR explains why SMR drives do not belong in a RAID array. Wondering what the DS423+ can actually do: Plex, Immich, Docker, VMs? See what the DS423+ can run.
Frequently asked questions
How many M.2 slots does the DS423+ have?
2. 2 × M.2 NVMe for cache; an NVMe storage pool requires a Synology drive
Is an NVMe cache worth it in the DS423+?
Only if you re-read the same data on the DS423+: project files, photos, container images. A media library streamed once gains nothing, and with 2 × 1GbE the link is often the limit before the drive is.
Can I put any NVMe in the DS423+?
No. The DS423+'s 2 M.2 slots take 2280 NVMe drives, and Synology's compatibility list for it names only its own SNV3400, SNV3410 and SNV5420 drives, which Synology requires for both cache and storage pools.
Can I put third-party drives in the DS423+?
Yes. Synology's 2025 drive policy applies only to models launched from 2025, so the DS423+ takes third-party hard drives and 2.5-inch SATA SSDs as it always has.
Devin Chua works out which drives, RAM and NVMe cache fit which NAS model at nasdrives.ca, and what the RAID choice means for usable capacity, checked against what is in stock on Amazon.ca.
Data checked by Owen Nakamura, Technical editor (data checking)