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Best 1TB External SSDs (Up to 1050 MB/s): 2026 Ranking — 5 Models Tested

By the manufacturer’s specs, external SSDs in the same class often look almost identical. But in real tests, performance in specific scenarios can differ by several times over — and today we’ll show that.

In this comparison, we look at five popular 1 TB external SSDs from the USB 3.2 Gen 2 class, up to 1050 MB/s. All models were tested using the same approach: under identical conditions, on the same platform, and with the same workload scenarios.

This is not a ranking based on impressions or numbers on the box. Only measured results matter here. We look separately at long sequential write, large-file read, and small-file responsiveness.

We tested five models in the USB 3.2 Gen 2 category:

  • Kingston XS1000 1TB
  • Samsung T7 1TB
  • Samsung T7 Resurrected 1TB
  • Crucial X9 Pro 1TB
  • SanDisk Extreme Portable SSD 1TB

How we tested

  • Sustained Sequential Write 250 GiB — long sequential write of a large volume of data.
  • Sequential Read 250 GiB — reading a large file from the SSD.
  • Random Read 4K QD1 — small files and everyday responsiveness.

Each scenario was run three times. Median values were used for comparison. Full raw data and all individual attempts are available on our website in the Data section — link in the description.

1. Sustained Sequential Write

This is the key test for external SSDs in this class. It shows not a short startup peak, but how the drive behaves during a long write: how long the fast SLC phase lasts, what happens after it ends, and what result the SSD delivers across the full write, not just in the first seconds.

This is where the differences between models become most useful for choosing between them. On the box, several SSDs may look almost identical, but after the cache is exhausted, their real behavior can diverge sharply.

A particularly clear example in this group is Kingston XS1000 1TB versus Samsung T7 1TB. Kingston XS1000 1TB keeps its fast write phase longer — up to about 112 seconds, at an average of around 790 MB/s. But after that, performance drops sharply: sustained average is around 101 MB/s, and average write speed across the full run is around 230 MB/s.

Samsung T7 1TB has a shorter fast phase — about 41 seconds at an average of around 755 MB/s. But after the cache is exhausted, it maintains a much higher sustained write level: sustained average around 436 MB/s, and average write speed across the full run around 458 MB/s.

That is the important difference. Kingston XS1000 1TB looks better during the longer initial fast phase, but Samsung T7 1TB is clearly stronger in prolonged sustained writing. For large transfers, that matters more than the initial peak.

Ranking in Sustained Sequential Write

  • Samsung T7 1TB — Avg Write ~458 MB/s, Sustained ~436 MB/s
  • Crucial X9 Pro 1TB — Avg Write ~421 MB/s, Sustained ~398 MB/s
  • SanDisk Extreme Portable SSD 1TB — Avg Write ~388 MB/s, Sustained ~352 MB/s
  • Samsung T7 Resurrected 1TB — Avg Write ~341 MB/s, Sustained ~290 MB/s
  • Kingston XS1000 1TB — Avg Write ~230 MB/s, Sustained ~101 MB/s

In this scenario, the leader is Samsung T7 1TB. Its advantage is not defined by peak startup speed, but by the fact that it remains clearly stronger than part of the group after the cache is exhausted. Crucial X9 Pro 1TB and SanDisk Extreme Portable SSD 1TB also perform confidently in long writes, without dropping to a very low sustained level. Kingston XS1000 1TB, by contrast, shows why SLC duration alone is not enough for a strong overall result.

2. Sequential Read 250 GiB

This test measures reading a large file back from the SSD to the computer. For the user, that means scenarios like video archives, project libraries, backups, and any task where a large amount of data needs to be read quickly from the drive.

In this category, the gap between models in read performance is usually smaller than in long writes. That is useful too: if long write is what separates the drives most clearly, sequential read more often shows how close they are in a less demanding workload.

Ranking in Sequential Read 250 GiB

  • Samsung T7 Resurrected 1TB — ~980 MB/s
  • Samsung T7 1TB — ~950 MB/s
  • SanDisk Extreme Portable SSD 1TB — ~930 MB/s
  • Crucial X9 Pro 1TB — ~890 MB/s
  • Kingston XS1000 1TB — ~820 MB/s

In this scenario, the picture changes. Samsung T7 Resurrected 1TB takes the lead, with Samsung T7 1TB very close behind. This is a good example of why an overall ranking should always be read through the lens of individual tests. A model may not lead in long write, while still taking first place in large-file read. Kingston XS1000 1TB remains in the group here as well, but no longer looks as competitive as it did during the initial fast write phase.

3. Random Read 4K QD1

This test is less about large files and more about everyday responsiveness. It shows how the drive handles small blocks of data: opening folders with many files, accessing project libraries, reading small service files, and general responsiveness in lighter tasks.

For a portable SSD, this is not usually the main buying scenario, but it is still useful as an extra layer of comparison. Especially when two models are close in sequential tests and you want to understand how they behave in small-file operations.

Ranking in Random Read 4K QD1

  • Crucial X9 Pro 1TB — ~36 MB/s, p99 ~1.2 ms
  • Samsung T7 Resurrected 1TB — ~34 MB/s, p99 ~1.3 ms
  • Samsung T7 1TB — ~32 MB/s, p99 ~1.4 ms
  • SanDisk Extreme Portable SSD 1TB — ~28 MB/s, p99 ~1.7 ms
  • Kingston XS1000 1TB — ~21 MB/s, p99 ~2.3 ms

Here, Crucial X9 Pro 1TB comes out on top. That does not automatically make it the best model in the whole article, but it does show a clear strength: it performs convincingly in small-file operations and latency. Samsung T7 Resurrected 1TB and Samsung T7 1TB also stay in the strong half of the group. Kingston XS1000 1TB, again, is weaker here than the leading models.

What matters when choosing an SSD in this class

If your main scenario is writing large volumes of data, the first thing to look at is Sustained Sequential Write. That is where differences between models in the up to 1050 MB/s class show up most clearly.

If large-file read matters more, Sequential Read 250 GiB becomes more important. The gaps here are usually smaller, but the leader may be different.

If the drive is often used for small files and light everyday tasks, it is worth also looking at Random Read 4K QD1 and latency.

Final thoughts

Even within one class of external SSDs — up to 1050 MB/s — models can differ noticeably in real behavior. The biggest gap usually appears in long writes after the SLC cache is exhausted. That is why, for this kind of comparison, it makes more sense to show separate tests with their own logic rather than a single overall score.

In this demonstration draft, Samsung T7 1TB looks strongest in the key long write scenario. Crucial X9 Pro 1TB looks the most balanced across the full group of tests. Samsung T7 Resurrected 1TB stands out more in read performance and small-file workloads. Kingston XS1000 1TB becomes a good example of why a long initial fast phase should not replace the final assessment of long-write behavior.