Best Hard Drive Price Per Terabyte Today

Recomputed every refresh · last updated 2026-10-03 · 188 listings in the field

Why it wins today

The HGST HUS726040ALS210 4TB SAS 12G leads the current qualified field with Excellent Market Value and GREAT PRICE Historical Value. Price per terabyte breaks ties after those two visible factors; it is not the only reason this product ranks first.

It sits in a field of 188 qualifying listings. It is non-new stock, recording technology not sourced, SAS-12G. That is a wide margin - the winner is not narrowly ahead, it is in a different price band from the rest of the field.

The criterion, stated

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.

Best current values by purchase type

Each row is the first qualifying product in the same transparent ranking used for the overall answer. Categories with no current qualifying listing are omitted.

Market Value compares current peers in the same use class, interface, condition, and capacity band. Historical Value reuses the shared Good Price calculation for the exact product condition. A progress indicator means the product remains purchasable but one of those signals does not yet have enough data. Historical Value compares a listing only with its own stored price record for that exact drive and condition. GREAT PRICE means today's price is within 3% of the lowest we have recorded for it, or at least 15% below its own 30- or 90-day average; GOOD PRICE, within 7% of that low or at least 7% below its 30-day average; HIGH PRICE, more than 7% above its own 30-day average; FAIR PRICE otherwise. It reads In progress when we hold fewer than 7 days of records, or when the price has never moved more than 3% across its record - an unchanged price is neither a low nor a high, so it gets no verdict. The two columns can disagree and both be right: Market Value asks whether a listing is cheap next to comparable drives on sale today, Historical Value asks whether it is cheap next to its own past. A small drive can be Expensive per TB against its peers and still be at the lowest price it has ever had.

What the criterion deliberately excludes: any seller we do not recognise and anything out of stock at the moment the page rendered. It does NOT exclude drives by recording technology - this is a price ranking, so every qualifying drive is ranked and each row says whether its recording is CMR, SMR or not sourced. If you are building an array, use the NAS verdict, which admits sourced CMR only.

The field, ranked

SAS rows are marked. A SAS drive will not plug into a desktop motherboard or a consumer NAS - it needs a host bus adapter and, in most chassis, a backplane. They are eligible on this page because they are legitimately the cheapest terabytes in the secondary market, and they are flagged because buying one by accident means it does not work at all.

Recent changes

• HP 695842-001 4TB SAS 6G took the verdict on 2026-08-19

The log records a winner only when it changes and shows the model and date, not a past listing price. Current prices remain in the live table; the change log records product identity only.

Who this suits

Anyone building bulk storage where capacity is the requirement and the interface is negotiable: homelab servers with spare bays, backup targets, archive tiers, and second-hand enterprise chassis that already have a controller.

This page lets qualified drives across capacities compete on two visible dimensions: current peer value and the exact product's stored-price signal. Raw cost per terabyte remains the tie-breaker, not the entire verdict.

Worth knowing: The winner here is frequently a drive most people cannot install. Read the interface column before acting, and use the NAS crown or a per-capacity verdict if your machine takes SATA only.

What the field looks like today

The 188 qualifying listings run from $12.50/TB to $31.25/TB, a spread of $18.75/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.

7 brands are represented. More than one manufacturer competing at the same specification is what makes the cheapest listing meaningful rather than incidental. The field mixes SATA and SAS, which are not interchangeable - the SAS rows are flagged in the table and need a controller most machines do not have.

The median listing in this field sits at $25.00/TB, 100% above the winner. Because this page ranks across 12 different capacities, the per-unit figure is doing real work: the cheapest terabyte and the cheapest drive are not the same listing here. New and used stock both qualify on this page and compete directly, which is unusual and worth noticing when you read the table.

The cheapest terabyte in the market, and its catch

This page ranks across every capacity rather than within one, which changes what the winner means. Within a capacity, the cheapest terabyte is straightforwardly the drive to buy. Across capacities, the cheapest terabyte is frequently a large enterprise drive, an interface most machines cannot take, or both - so the answer needs reading rather than acting on directly.

SAS is the usual reason. Retired enterprise SAS drives are consistently the cheapest terabytes in existence because the supply is large, the drives are sound and the buyer pool is small - most people cannot use them. A SAS drive needs a host bus adapter and usually a backplane. If you have a server with spare bays and a controller, this ranking is pointing at genuinely the best value in storage. If you have a desktop or a consumer NAS, it is pointing at something you cannot plug in.

The second reason is capacity itself. The cheapest terabyte is often found on a large drive, and a large drive is only good value if you need that much. Four terabytes at a great price per terabyte is worse value than eight at a mediocre one if you actually needed eight.

Use this page to understand where the floor is and what sits on it. For a drive you can definitely use, the per-capacity verdicts and the NAS crown apply the interface constraints your hardware actually has.

What this verdict does not tell you

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, day after day.

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.

See the whole market instead

This page gives one answer. If you want the full catalogue rather than a verdict, these are the pages that carry it:

Cheapest per TB, full ranking · The value-frontier curve · Historically favorable HDD deals · Every verdict we publish · Where prices are heading · CMR/SMR list

Frequently asked questions