SSD TBW in 2026: What a Terabyte of Writes Actually Costs

Every buying guide tells you to check the SSD TBW rating and none of them prices it. The drives on our own shelf are rated from 220 to 1,600 terabytes written — a span wide enough to look decisive — and nobody answers whether paying for the bigger number changes which drive you should buy. Every rating below was copied from the manufacturer’s own datasheet or warranty table on Oct 20, 2026; every price is a dated observation at a named US retailer; the two are divided into each other by code that ships with a test.

The short answer, before the tables: the Crucial P3 Plus 1TB and the Crucial T500 2TB cost 1.02x each other per gigabyte and 2.77x each other per terabyte written.

What a TBW rating actually promises

TBW stands for terabytes written. It is not a measurement of how long a drive survives, and no manufacturer claims it is: it is the point at which the warranty stops. Samsung puts it on the warranty table itself — coverage runs for “the stated time period or the TBW, whichever comes first”. Sandisk puts it in footnote six of the SN850X data sheet: “5 years or Max Endurance [TBW] limit, whichever occurs first”. Micron measures the ceiling off the drive’s own SMART counter.

So the number is not a physical property being disclosed to you; it is a liability being capped. A rating twice as large is a warranty that accepts twice as much writing before it expires — a real thing to buy, just not the thing most pages selling you a drive imply you are buying.

Two things there are worth pausing on. Kingston publishes petabytes where everyone else publishes terabytes, so the KC3000 row reads 1.6PBW. And the basis column holds four different answers for one column of one spec sheet: Samsung names JEDEC JESD218, Sandisk the JEDEC client workload JESD219, Micron the drive’s own SMART data, and SK hynix hedges with “up to” and names nothing.

Six of our eight drives share one rating

Divide each rating by the capacity it rates and the spread collapses: 6 of our 8 tracked NVMe drives come out at exactly 600 TBW/TB — two Samsungs at two capacities, two Sandisks at two capacities, the Crucial T500 and the SK hynix P41. Four vendors, four controllers, four price points, one number.

Two drives sit outside that cluster, on opposite sides of it. The Kingston KC3000 2048GB is rated 781.25 TBW/TB; the Crucial P3 Plus 1TB is rated 220 TBW/TB, which is 3.55x below the top of the basket and the only figure far enough out to change an answer.

What a terabyte written costs on our shelf

Here is the sum nobody in the search results does: our cheapest recorded in-stock price per drive, divided once by capacity and once by the published rating. The prices render from our database when you load the page, so each date is when we recorded it — not when this article was written.

On that reading the dearest gigabyte costs 32.1% more than the cheapest one — $0.244 against $0.184 — while the dearest written terabyte costs 177.1% more than the cheapest, $0.852 against $0.307. Same shelf, same day, same observations. The second spread is 5.52x the first. For reference, our whole tracked NVMe cohort medians $0.199 a gigabyte from 7 SKUs.

What pricing endurance changes, and what it does not

We ranked the same drives twice, once by cost per gigabyte and once by cost per terabyte written, and compared the two orders. This is the test that decides whether the endurance column is worth your attention or just worth a paragraph.

3 of the 7 priced drives change place, 4 hold, and the largest move is 5 places — Kingston KC3000 2048GB, Crucial P3 Plus 1TB and WD Black SN850X 2TB. Kingston KC3000 2048GB is the seventh-cheapest gigabyte on this shelf and the second-cheapest written terabyte. The movement is not noise: it is the drives outside the rating cluster changing places with the 5 inside it.

There is a happy accident on our shelf today worth naming, because it will not always hold: the cheapest gigabyte and the cheapest written terabyte are the same drive. The Crucial T500 2TB is first on both lists, at $0.184 a gigabyte and $0.307 a written terabyte. When the drive with the highest rating is also the cheapest, the endurance question answers itself and you can go back to reading the price.

What you would have to write to use the rating up

A ceiling you cannot reach is not a feature you are buying. So divide each rating by the term it is bounded by and read it as a daily allowance. All eight drives here quote five years, which makes this the cleanest comparison in the article: the term is a constant and only the rating moves.

The premium drives ask for 329 GB a day per terabyte of capacity, every day, for five years — 657 GB a day on a 2TB drive. Desktop use does not write a tenth of that, so on a 600 TBW/TB drive the five-year clock expires long before the write ceiling, and the rating is not the binding half of the warranty.

The budget drive is where that stops being true. Crucial P3 Plus 1TB allows 120 GB a day, which a nightly full-disk backup or a video scratch disk can genuinely spend. It is the one drive here where the rating rather than the calendar ends the cover — and the one the per-gigabyte ranking calls mid-table.

Samsung’s own table: one figure, nine rows

One more test, and it needs no basket of ours: Samsung publishes every consumer SSD warranty on one page, so the line can be read at a single capacity across a decade of parts. We took every 2TB row, because holding capacity fixed is the only way to see what the rating has done over time.

In that table, 9 of the 14 rows carry the identical 1,200 TBW figure, and every NVMe model in the table is one of them — from the 960 PRO through the 9100 PRO. Four controller generations, two NAND process shifts and a tripling of sequential read speed later, the rated endurance of a 2TB Samsung NVMe flagship is the number it was at the start.

The only 2TB row rated higher is the 860 PRO, a SATA drive, at 2.00x the flagship figure. And the longest term anywhere in that table belongs to the 850 PRO at 10 years: the oldest drive on the page, rated at a fraction of today’s TBW and covered for twice as long. The two dials trade against each other, and the TBW figure alone hides which one moved.

Five vendors, five ways of printing one number

If you compare TBW figures across brands you are comparing documents, not measurements. Here is every vendor in our basket, with the exact string it prints and the basis it gives for it.

None of this is careless: JESD218 is the endurance verification method and JESD219 the client workload it runs, so Samsung and Sandisk name two halves of one JEDEC framework. But a reader comparing “1,200 TBW” to “1.6PBW” to “up to 1,200 TBW” is comparing a verified figure, a bare datasheet row and a hedge. Treat the unqualified ones as the vendor’s intent rather than its measurement.

A bigger drive is not rated harder

The common shorthand is that bigger drives get proportionally more endurance. Our own basket can neither confirm nor deny it: the Samsung and Sandisk pairs scale exactly linearly, 1,200 TBW at 2TB and 2,400 at 4TB, which is the same per-terabyte figure twice. One vendor does publish three capacities of one model, and it goes the other way.

On SK hynix's own table the per-terabyte rating falls as the drive grows — 1,000 TBW/TB at the smallest capacity down to 600 TBW/TB at the largest, a 40.0% reduction. The 2TB P41 we track is rated less hard per terabyte than the 500GB version of itself, so this is not a rule you can apply to a drive you have not looked up — the same point the per-capacity price curve makes about dollars.

Who is actually behind the promise

If the rating is a warranty term rather than a physical property, then it is worth exactly as much as the company writing it. Two of the 8 drives in this basket — Crucial T500 2TB and Crucial P3 Plus 1TB — carry a Crucial warranty, and Crucial is leaving.

We are not telling you a Crucial drive is a bad buy, and the pledge above is explicit. The narrower, checkable point: a TBW figure is the ceiling on a contract, so pricing one prices a counterparty as well as a component. No spec sheet carries that column — and it is worth knowing before the rest of the market reprices around it.

How to read a TBW number in four steps

It is short because the data is thinner than the buying guides imply. The honest answer to “how much TBW do I need” is: more than you will write, which nearly every current NVMe drive already provides. Spend the attention on the price and the warranty you can collect on instead.

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