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Seagate
Model: STFS4000400
| Capacity | 4TB |
| Interface | USB 3.2 Gen 2 |
| Form Factor | External |
| Read Speed | 2,000 MB/s |
| Write Speed | 2,000 MB/s |
| Endurance (TBW) | 2,400 TB |
| Warranty | 5 Years |
A 4TB Gen 2x2 RGB-lit gaming SSD — the largest single-portable FireCuda with the full 5-year Seagate warranty. Real value-add at this size: 5 years + Rescue data recovery plan bundled in. PS5/Xbox cold-library-ready, easily handling moving multi-game installs at 2000 MB/s.
See how it stacks up against competitors in our High-Speed Portable SSDs SSD comparison, or browse related SSD buying guides.
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4TB at 2.0 GB/s — the Seagate FireCuda Gaming SSD Portable 4TB is the NVMe game drive that keeps up with your growing library.
Game storage with 2.0 GB/s reads and 2.0 GB/s writes cuts load times dramatically compared to HDDs. Open-world games benefit most — assets stream in faster, reducing texture pop-in and stutter.
4TB translates to about 50-100 modern game installs. That's Call of Duty, Fortnite, your RPG of the month, and still room for a dozen indies.
At 2.0 GB/s reads, this is one of the fastest USB drives you can pair with a console. Load times will rival internal SSD performance for many titles.
While USB-connected externals store and play Xbox Series X|S and PS5 titles, native internal SSDs may be required for full next-gen optimized performance on certain titles.
The Seagate FireCuda Gaming SSD Portable 4TB 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 4TB portable SSD.
At 4TB, this drive hits the sweet spot for users with substantial storage needs. Photo and video libraries, game collections, and professional project files all benefit from the headroom — you will not be juggling free space or swapping files between drives.
The USB 3.2 Gen 2 interface means the Seagate FireCuda Gaming SSD Portable 4TB hits full speed on virtually any modern USB-C or USB-A port — no special hardware required. Plug it into a laptop, desktop, game console, or tablet and you get the same 2,000 MB/s performance without compatibility concerns.
On paper, the Seagate FireCuda Gaming SSD Portable 4TB 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.
At 2,000 MB/s, thermal throttling is minimal during typical use. Only sustained sequential writes exceeding 100GB — such as backing up an entire media library in one pass — may cause the controller to reduce speeds temporarily. For everyday transfers and backups, you will consistently see performance near the rated specifications.
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 $Seagate FireCuda Gaming SSD Portable 4TB 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 $Seagate FireCuda Gaming SSD Portable 4TB is rated for $2,400 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 $132 years to reach its endurance limit. For typical use patterns involving backups, file transfers, and game storage, the $2,400 TBW rating provides comfortable headroom well beyond the $5-year warranty period.
| Spec | Seagate FireCuda Gaming SSD Portable 4TB | Samsung T9 Portable SSD |
|---|---|---|
| Read Speed | 2,000 MB/s | 2,000 MB/s |
| Write Speed | 2,000 MB/s | 1,950 MB/s |
| Capacity | 4TB | 1TB |
| Interface | USB 3.2 Gen 2 | USB 3.2 Gen 2x2 |
| Endurance | 2,400 TBW | 600 TBW |
| Score | 8.5/10 | 9.6/10 |
The Samsung T9 Portable SSD scores higher in our evaluation (9.6 vs 8.5/10). While the Seagate FireCuda Gaming SSD Portable 4TB has lower scoring, it may offer advantages in other areas like endurance. Review the full specifications above before deciding.
For a detailed head-to-head comparison, see our full Seagate FireCuda Gaming SSD Portable 4TB vs Samsung T9 Portable SSD comparison.
| Model | Capacity | Interface | Read | Write | TBW |
|---|---|---|---|---|---|
| Seagate FireCuda Gaming SSD Portable 4TB | 4TB | USB 3.2 Gen 2 | 2,000 | 2,000 | 2,400 |
| Samsung T9 Portable SSD | 1TB | USB 3.2 Gen 2x2 | 2,000 | 1,950 | 600 |
| Samsung T9 Portable 4TB | 4TB | USB 3.2 Gen 2x2 | 2,000 | 2,000 | 2,400 |
| Crucial X10 Pro Portable 4TB | 4TB | USB 3.2 Gen 2x2 | 2,000 | 2,000 | 2,400 |
Specs shown for the closest High-Speed Portable SSDs alternatives. Full comparison table available on the compare page.
The Seagate FireCuda 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.
Seagate
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.
Seagate
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.
Seagate
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.
Seagate
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.