As an Amazon Associate I earn from qualifying purchases. We may earn a commission from qualifying purchases made through links on this page. Prices and availability are subject to change. We are reader-supported and independent — our rankings are based on an objective scoring rubric, not sponsorship.
Samsung
Model: MU-PD4T0S
| Capacity | 4TB |
| Interface | USB 3.2 Gen 2x2 |
| Form Factor | External |
| Read Speed | 2,000 MB/s |
| Write Speed | 2,000 MB/s |
| Endurance (TBW) | 2,400 TB |
| Warranty | 5 Years |
The 4TB T9 portable is genuinely rare — most 4TB external SSDs cap at Gen 2 (10Gbps) speeds. The T9 4TB holds 2000 MB/s sustained reads AND writes at 4TB. The right drive for working video pros who genuinely travel with 4TB of working RAW footage and need Gen 2x2 link speeds.
See how it stacks up against competitors in our High-Speed Portable SSDs SSD comparison, or browse related SSD buying guides.
Click through to view the current price, availability, and full product details on the retailer's site.
Check on Amazon →We earn a commission from qualifying purchases made through these links. Prices and availability are subject to change — see the retailer's site for current pricing.
The Samsung Samsung T9 Portable 4TB brings 2.0 GB/s reads and 4TB capacity over USB 3.2 Gen 2×2 — fast enough for professionals, priced for everyone else.
2.0 GB/s reads and 2.0 GB/s writes over USB 3.2 Gen 2×2 put the Samsung T9 Portable 4TB in a sweet spot: faster than any standard USB drive, without the premium Thunderbolt tax. Edit 4K video directly from the drive and move large project files in seconds.
The Samsung T9 Portable 4TB is backward compatible with every USB-C and USB-A port in existence. You only get the full 20 Gbps with a Gen 2×2 host, but it is still a fast 10 Gbps drive on standard USB-C — no special hardware required.
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 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.
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 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 $Samsung T9 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 $Samsung T9 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 | Samsung T9 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 2x2 | USB 3.2 Gen 2x2 |
| Endurance | 2,400 TBW | 600 TBW |
| Score | 9.6/10 | 9.6/10 |
Both drives score 9.6/10 in our evaluation. Sequential performance is similar — compare other factors like endurance, warranty, and build quality. Check both models on the retailer's site for the latest details.
For a detailed head-to-head comparison, see our full Samsung T9 Portable 4TB vs Samsung T9 Portable SSD comparison.
| Model | Capacity | Interface | Read | Write | TBW |
|---|---|---|---|---|---|
| Samsung T9 Portable 4TB | 4TB | USB 3.2 Gen 2x2 | 2,000 | 2,000 | 2,400 |
| Samsung T9 Portable SSD | 1TB | USB 3.2 Gen 2x2 | 2,000 | 1,950 | 600 |
| Crucial X10 Pro Portable 4TB | 4TB | USB 3.2 Gen 2x2 | 2,000 | 2,000 | 2,400 |
| Sabrent Rocket Nano V2 | 1TB | USB4 | 3,000 | 2,800 | 700 |
Specs shown for the closest High-Speed Portable 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 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.
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.