Compatibility / QNAP / TS-664

Compatible Hard Drives for the QNAP TS-664

QNAP's list for the TS-664 read 19 August 2026. Prices live.

What QNAP's list actually commits to

QNAP is unusually direct about this, and the wording is worth reading closely because it settles the question most buyers are really asking. On its compatibility page it says:

“QNAP customer service is unable to provide technical support for devices not listed on the QNAP compatibility list.”

That is a statement about the support desk, not about the hardware. Nothing in it says an unlisted drive will fail to work, and in practice it does not - the TS-664 will initialise a drive QNAP has never tested and build a volume on it. What you forfeit is the right to call QNAP about it.

Its recommendation is phrased the same way:

“To ensure optimal compatibility and performance, please use devices included in the compatibility list.”

Please use is not you must use. And the clearest evidence of the posture is that QNAP itself offers a way around its own list, linking one compiled from customer reports: “Click here to check unofficial (reported by users) compatibility list.” A manufacturer that intended its list to be a gate does not publish a door beside it.

Quoted from QNAP's compatibility page, www.qnap.com, read 19 August 2026. We record what the list said on that date; we do not re-read it when you load this page.

In stock now for the TS-664

Internal SATA hard drives available today, cheapest per terabyte first. Where the exact model appears on QNAP's list for this machine it is marked vendor-listed; where it does not, the row says so rather than leaving the question open.

7 of the 20 drives above match a part number on QNAP's TS-664 list. A drive can be absent because QNAP never tested it rather than because it failed - QNAP's list runs to 390 entries and the market is larger than that. Buy links are affiliate links; prices update every few hours.

The shape of QNAP's list for this machine

390 entries across 3 brands - WD 151, Toshiba 129, Seagate 110. That spread is worth noticing: QNAP tests broadly across the manufacturers who actually make NAS drives rather than steering you toward one.

The families at the top are the NAS and enterprise lines, which is the useful signal in the table. QNAP is not telling you a desktop drive will fail; it is telling you where it spent its testing budget, and it spent it where the drives are designed to run continuously.

How this compares with the other manufacturers

QNAP sits in the middle of a real spectrum, and the middle is a defensible place to be.

At one end, Ubiquiti publishes no list at all, only a specification - 1TB or larger, CMR, 7200RPM - and any drive meeting it qualifies. At the other, Synology will not create a storage pool on an unlisted hard drive on its 2025-and-later Value and J-series machines, and lists no third-party hard drive at all. QNAP tests widely, publishes the result per machine, tells you support depends on it, and blocks nothing.

For a buyer the practical difference is what the list decides. QNAP's decides who answers the phone. Synology's, on those machines, decides who you can buy from.

Other QNAP machines

We measured three QNAP machines and captured the full drive rows for one. The TS-664 lists 390 drives; the TS-673A lists 676 and the TS-653D 437, both with different brand mixes. Those two do not have pages here because we recorded their totals without capturing their rows, and a page whose table we cannot render from captured data would have to invent it.

See the compatibility hub for the full vendor comparison.