Does the Synology DiskStation DS224+ support NVMe?
No. The Synology DiskStation DS224+ has no internal M.2 slot, so it cannot take an NVMe SSD as a cache or a storage pool. Over its 2 × 1GbE that is barely a loss: a single CMR drive already saturates the link, and a cache only helps data you read repeatedly. For flash storage, the DS224+'s bays take 2.5-inch SATA SSDs. If an NVMe cache or pool matters to you, choose a model with M.2 slots.
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Want to know whether the DS224+ fits your actual storage plan? Open the NAS Builder with this model weighted.
Do you actually need NVMe on the DS224+?
An NVMe cache accelerates random I/O: the many small, scattered reads and writes you get when lots of users, a database or virtual machines all hit the array at once. It does almost nothing for the workload the DS224+ is built for: sequential file transfers, device backups and everyday storage. On this model the 2 × 1GbE connection is the real ceiling, so a cache sitting in front of the drives would have no headroom to give: the network fills up long before the disks become the bottleneck.
Put the money where it moves the needle instead. A RAM upgrade helps this box more than any cache would (see RAM for the DS224+ and how much RAM a NAS needs), and larger CMR drives with the best CA$/TB, sized in the drive-count calculator. If you genuinely need a cache; a busy multi-user array, 10-gigabit networking, or a database/VM workload; that is simply a different class of NAS: an Intel model with M.2 slots and faster networking. Our SSD cache guide explains when a cache earns its place and when it does nothing, and drives by model lists the boxes that have the slots.
Drive policy: Synology's 2025 drive policy applies only to models launched from 2025, so the DS224+ takes third-party hard drives and 2.5-inch SATA SSDs as it always has. The DS224+’s full compatibility rules.
Keep calculating
To see how much capacity is left after parity, the DS224+ capacity calculator is preset to its 2 bays and RAID types. For the DS224+, 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 DS224+ can actually do: Plex, Immich, Docker, VMs? See what the DS224+ can run.
Frequently asked questions
How many M.2 slots does the DS224+ have?
None. No M.2 slots
Is an NVMe cache worth it in the DS224+?
Not possible: the DS224+ has no M.2 slots. Over its 2 × 1GbE a cache would add little anyway, since a single drive already saturates the link.
Can I put third-party drives in the DS224+?
Yes. Synology's 2025 drive policy applies only to models launched from 2025, so the DS224+ 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.