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Lexar
Model: LXBL600-1TRNN
| Capacity | 1TB |
| Interface | USB 3.2 Gen 2x2 |
| Form Factor | External |
| Read Speed | 2,000 MB/s |
| Write Speed | 2,000 MB/s |
| Endurance (TBW) | 600 TB |
| Warranty | 3 Years |
A premium 2000 MB/s Gen 2x2 portable with an aluminum body and an RGB-lit Logo. The RGB is a divisive feature but the performance is real, and the build quality distinguishes it from cheaper Gen 2x2 peers like the Patriot Evlvr.
See how it stacks up against competitors in our USB-C External SSDs SSD comparison, or browse related SSD buying guides.
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The Lexar Lexar SL660 1TB delivers 2.0 GB/s writes and 1TB capacity — pro-grade speed without the Thunderbolt price premium.
This NVMe drive over Gen 2×2 leaves SATA-based USB drives in the dust — expect 3-4x the throughput of a 550 MB/s SATA external. 2.0 GB/s reads and 2.0 GB/s writes put it in Thunderbolt-adjacent territory for a fraction of the cost.
Unlike Thunderbolt drives, the Lexar SL660 1TB works with any USB-C or USB-A port, though Gen 2×2 speeds require a compatible host port. Connected to a standard USB 3.2 Gen 2 port, it still delivers up to 10 Gbps — enough for fast backups and everyday transfers.
USB 3.2 Gen 2x2 requires a 20 Gbps host port, often labeled 'SSP+' or '20 Gbps'. Most laptops before 2023 lack this — verify compatibility.
The Lexar SL660 1TB targets users who need maximum throughput from an external drive. If you edit 4K or 6K video, move large project files between workstations, or work directly from external storage, the 2,000 MB/s read speed puts this drive in elite territory for a 1TB portable SSD.
The 1TB capacity covers most daily workflows comfortably: system backups, a working photo library, a dozen game installs, or a collection of documents and media. If you need more space, higher-capacity variants of the same product line are worth considering.
One important note: reaching the full 2,000 MB/s requires a USB 3.2 Gen 2x2 (20 Gbps) host port. On a standard USB 3.2 Gen 2 port, the drive still works perfectly but negotiates down to 10 Gbps. Most laptops from 2022 onward include a compatible port on premium models, but verify your hardware before expecting peak performance.
On paper, the Lexar SL660 1TB delivers 2,000 MB/s reads and 2,000 MB/s writes. In practice, a 50GB file — a typical 4K video project, a large game install, or a full photo shoot — transfers in ~25 seconds. A 100GB batch of raw files moves in ~50 seconds. For users who regularly shuttle large files, these transfer times are a meaningful productivity improvement over slower SATA-based externals that take 3-5x longer for the same tasks.
The 2,000 MB/s peak is achievable for burst transfers, but sustained writes of 100GB or more will see speeds settle to approximately 1,700-1,800 MB/s as the controller manages thermals. This is normal for compact NVMe enclosures and does not affect everyday use — only continuous large-file writes are impacted.
Sequential read and write speeds — the numbers manufacturers advertise — matter most when transferring single large files. For everyday tasks like opening documents, browsing photos, running applications from the drive, or loading games, random 4K performance is more relevant. All NVMe-based external SSDs deliver random IOPS in the same general range, so the $Lexar SL660 1TB feels similarly responsive to other fast portables for daily use. The real differentiator shows up during large file transfers, where the $2,000 MB/s read speed pulls noticeably ahead of slower SATA-based externals.
The $Lexar SL660 1TB is rated for $600 TBW (terabytes written) endurance. To put that in perspective: if you write 50GB per day — an aggressive daily workload for most users — the drive would take approximately $33 years to reach its endurance limit. For typical use patterns involving backups, file transfers, and game storage, the $600 TBW rating provides comfortable headroom well beyond the $3-year warranty period.
| Spec | Lexar SL660 1TB | Samsung T9 2TB |
|---|---|---|
| Read Speed | 2,000 MB/s | 2,000 MB/s |
| Write Speed | 2,000 MB/s | 2,000 MB/s |
| Capacity | 1TB | 2TB |
| Interface | USB 3.2 Gen 2x2 | USB 3.2 Gen 2x2 |
| Endurance | 600 TBW | 1,200 TBW |
| Score | 8.1/10 | 9.6/10 |
The Samsung T9 2TB scores higher in our evaluation (9.6 vs 8.1/10). While the Lexar SL660 1TB has lower scoring, it may offer advantages in other areas like value. Review the full specifications above before deciding.
For a detailed head-to-head comparison, see our full Lexar SL660 1TB vs Samsung T9 2TB comparison.
| Model | Capacity | Interface | Read | Write | TBW |
|---|---|---|---|---|---|
| Lexar SL660 1TB | 1TB | USB 3.2 Gen 2x2 | 2,000 | 2,000 | 600 |
| Samsung T9 2TB | 2TB | USB 3.2 Gen 2x2 | 2,000 | 2,000 | 1,200 |
| Samsung T9 Portable SSD | 1TB | USB 3.2 Gen 2x2 | 2,000 | 1,950 | 600 |
| Crucial X10 Pro 2TB | 2TB | USB 3.2 Gen 2x2 | 2,000 | 2,000 | 1,200 |
Specs shown for the closest USB-C External SSDs alternatives. Full comparison table available on the compare page.
The Lexar SL660 comes in multiple capacities. Smaller sizes save money if you do not need the headroom; larger sizes drop the cost-per-TB for media libraries and Time Machine backups.
Lexar
Price as of Aug 3, 2026, 6:33 PM. Prices and availability are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.
Lexar
Price as of Aug 3, 2026, 6:33 PM. Prices and availability are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.
Lexar
Price as of Aug 3, 2026, 6:33 PM. Prices and availability are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.