The best surveillance hard drive today is the Seagate SkyHawk AI 32TB ST32000VE000 at $1159.99 ($36.25/TB), as of 2026-10-01.
Recomputed every refresh · last updated · 12 listings in the field
The Seagate SkyHawk AI 32TB ST32000VE000 takes it at $36.25/TB against the runner-up's $41.56/TB - a margin of $5.31/TB, or 14.6%. That gap is computed, not asserted: it is the arithmetic difference between the two cheapest qualifying listings we hold, and it is the whole of the reason one is above the other.
It sits in a field of 12 qualifying listings. It is new stock, CMR recording, SATA-6G.
Best = lowest cost per terabyte among in-stock, new SATA drives from the makers' surveillance lines (WD Purple, Seagate SkyHawk) whose CMR recording is sourced to the maker for the exact part number. Camera-stream counts and workload ratings are the makers' specifications; we do not measure them and do not rank on them.
Most "best drive" pages do not tell you what best meant, which makes them impossible to argue with and therefore impossible to trust. Ours is one sentence and you can reject it: if you would rather optimise for warranty length, for a specific manufacturer, or for the lowest absolute price rather than the lowest price per unit, the full field is ranked below and you can take a different row knowing exactly what you are trading.
What the criterion deliberately excludes: any drive whose CMR recording is not sourced to its maker for its exact part number - unknown, or recorded without a per-model source, is not treated as CMR - any seller we do not recognise, and anything out of stock at the moment the page rendered. SAS drives are excluded here because they need a host bus adapter and a backplane that a desktop or consumer NAS does not have.
| # | Drive | Capacity | Price | Per TB | Buy/View Price |
|---|---|---|---|---|---|
| WINNER | Seagate SkyHawk AI 32TB ST32000VE000 | 32TB | $1159.99 | $36.25 | Buy/View Price |
| 2 | Seagate SkyHawk AI 16TB ST16000VE000 | 16TB | $665.00 | $41.56 | Buy/View Price |
| 3 | Seagate SkyHawk AI 16TB ST16000VE002 | 16TB | $679.00 | $42.44 | Buy/View Price |
| 4 | WD WD Purple Pro 18TB WD181PURP | 18TB | $765.78 | $42.54 | Buy/View Price |
| 5 | Seagate SkyHawk AI 10TB ST10000VE0008 | 10TB | $468.94 | $46.89 | Buy/View Price |
Tracking has just started for this page, so there is no change history yet. We will not invent one: the log fills when the winner actually changes hands, and until then the honest statement is that we began watching and nothing has moved. That emptiness is temporary and it is the reason this page will be worth more in three months than it is today.
Anyone filling a network video recorder or a camera system's storage: drives that write continuously, around the clock.
Surveillance lines are the makers' own drives for continuous recording. This page ranks those lines on cost per terabyte, and only drives whose CMR recording is sourced to the maker for the exact part number qualify.
Worth knowing: Stream counts and workload ratings are the makers' specifications for each model, and they differ across the field. We do not measure them and the ranking does not use them, so check the rating for the number of cameras you run.
The 12 qualifying listings run from $36.25/TB to $114.82/TB, a spread of $78.57/TB between the cheapest and dearest drive that meets the same standard. That spread is worth looking at before you act on the verdict: a tight field means the market has settled and the winner is a few percent ahead of an equivalent product, while a wide one means the drives differ in something the criterion does not capture - usually product line, warranty term or how long the listing has been sitting.
2 brands are represented. More than one manufacturer competing at the same specification is what makes the cheapest listing meaningful rather than incidental.
The median listing in this field sits at $48.33/TB, 33% above the winner. Because this page ranks across 8 different capacities, the per-unit figure is doing real work: the cheapest terabyte and the cheapest drive are not the same listing here.
This page ranks the makers' surveillance lines - WD Purple and Seagate SkyHawk - by cost per terabyte, among new SATA drives whose CMR recording is sourced to the maker for the exact part number.
The specifications that matter most for a recorder are the makers' own: how many camera streams a model is rated for, and its annual workload rating. They differ between models and generations, we do not measure them, and the ranking does not use them. Check the rating against the number of cameras you run before buying.
A surveillance drive is not automatically the right drive for a NAS, and a NAS drive is not automatically right for a recorder; the makers rate them for different workloads. Our surveillance cluster covers the ratings by model.
It is a price-and-fitness answer and nothing more. We do not run a test lab, we publish no read or write figures, and there is no claim anywhere on this page that one drive is faster than another. Ranking storage by speed requires measuring it, and anyone who does should tell you how; we would rather rank on what a catalogue can actually observe every few hours.
It also cannot tell you how a manufacturer handles a warranty claim, how loud a drive is in a room you sit in, or whether a particular batch had a bad year. Those are the things a review is for. What this page does that a review cannot is stay correct: it is recomputed when you load it, and the field it beat is printed underneath so you can see the answer being earned rather than asserted.
This page gives one answer. If you want the full catalogue rather than a verdict, these are the pages that carry it:
Surveillance workload ratings · WD Purple · Seagate SkyHawk · Every verdict we publish · Where prices are heading · CMR/SMR list
Today's cheapest is not a reason to buy today. This answer is recomputed from live prices, so it will change - sometimes in your favour. Buy when you need the capacity, not because a page named a winner, and read the criterion above: it ranks what we can measure, which is price and fitness, not everything that matters to you.
Seagate SkyHawk AI 32TB ST32000VE000, at $1159.99 ($36.25/TB). That is the lowest cost per terabyte among the 12 listings that meet this page's criteria. It is a price-and-fitness verdict rather than a performance ranking.
We log the winner every time it changes and show the last three above. This page has only just started tracking, so there is nothing to show yet - and we would rather say that than imply a history we do not have. Check back and the log will fill itself.
Because the criterion is cost per terabyte, not brand reputation, and it is printed on this page precisely so you can disagree with it. Every drive in the field passes a brand gate - we will not name an unrecognised seller as an answer - but among drives that pass, the cheapest terabyte wins. If you value a specific manufacturer's warranty handling or a particular product line, the full field below is ranked and you can pick a different row with the trade-off visible.
No, and this is the most important limitation on the page. We do not benchmark drives, we do not publish read or write figures, and nothing here claims one drive is faster than another. What we can measure is price, availability, capacity, interface and recording technology, so the verdict is built from those. Anyone ranking drives by speed should tell you how they measured; we would rather rank on what we can actually observe.
How much weight the verdict carries. 12 listings meet the criteria right now. That is a deep field: several sellers are competing and the winner earned it against real alternatives.