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Samsung
Model: MU-PG4T0B
| Capacity | 4TB |
| Interface | USB 3.2 Gen 2x2 |
| Form Factor | External |
| Read Speed | 2,000 MB/s |
| Write Speed | 1,950 MB/s |
| Endurance (TBW) | 1,200 TB |
| Warranty | 5 Years |
Blazing-fast 4TB external SSD with USB 3.2 Gen 2x2 speeds up to 2000MB/s. Perfect for content creators with massive file libraries.
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 Samsung Samsung T9 Portable 4TB delivers 1.9 GB/s writes and 4.1TB capacity — pro-grade speed without the Thunderbolt price premium.
USB 3.2 Gen 2×2 unlocks a 20 Gbps pipeline, and the Samsung T9 Portable 4TB uses every bit of it. With 2.0 GB/s reads and 1.9 GB/s writes, this drive handles 4K and 6K video editing directly from the drive — a 50GB file transfers in ~26 seconds, making it a strong alternative to Thunderbolt solutions for professionals on a budget.
Unlike Thunderbolt drives, the Samsung T9 Portable 4TB 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.
A 20 Gbps port is mandatory for Gen 2x2 speeds. On standard USB-C (10 Gbps) the drive still works but tops out at roughly half the rated throughput.
The Samsung T9 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 4.1TB portable SSD.
At 4.1TB, 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.
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 Samsung T9 Portable 4TB delivers 2,000 MB/s reads and 1,950 MB/s writes. In practice, a 50GB file — a typical 4K video project, a large game install, or a full photo shoot — transfers in ~26 seconds. A 100GB batch of raw files moves in ~51 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. Note: those numbers describe large sequential transfers — everyday tasks (opening documents, app launches, game loads) feel equally fast across all NVMe portables because random 4K performance is similar drive-to-drive.
The 2,000 MB/s peak is achievable for burst transfers, but sustained writes of 100GB or more will see speeds settle to approximately 1,658-1,755 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.
The Samsung T9 Portable 4TB is rated for 1,200 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 66 years to reach its endurance limit. For typical use patterns involving backups, file transfers, and game storage, the 1,200 TBW rating provides comfortable headroom well beyond the 5-year warranty period.
| Spec | Samsung T9 Portable 4TB | Samsung T9 2TB |
|---|---|---|
| Read Speed | 2,000 MB/s | 2,000 MB/s |
| Write Speed | 1,950 MB/s | 2,000 MB/s |
| Capacity | 4.1TB | 2TB |
| Interface | USB 3.2 Gen 2x2 | USB 3.2 Gen 2x2 |
| Endurance | 1,200 TBW | 1,200 TBW |
| Score | 9.3/10 | 9.6/10 |
The Samsung T9 2TB scores higher in our evaluation (9.6 vs 9.3/10). While the Samsung T9 Portable 4TB 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 Samsung T9 Portable 4TB vs Samsung T9 2TB comparison.
| Model | Capacity | Interface | Read | Write | TBW |
|---|---|---|---|---|---|
| Samsung T9 Portable 4TB | 4TB | USB 3.2 Gen 2x2 | 2,000 | 1,950 | 1,200 |
| 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 Samsung T9 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.
Samsung
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.
Samsung
Price as of Jul 3, 2026, 4:11 AM. 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.
Samsung
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.
Samsung
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.