OWC Express 2TB
Score: 79/100
SanDisk Extreme PRO 4TB USB-C
Score: 85/100Rankings
The SanDisk Extreme PRO Portable SSD 4TB delivers Thunderbolt-class performance with up to 3800 MB/s read and 3700 MB/s write speeds in a rugged, IP65-rated chassis. Its peak speeds are only reachable on USB4 or Thunderbolt 4 hosts, and it lacks built-in hardware encryption. Ideal for creators needing ultra-fast portable storage.
The OWC Express 1M2 offers up to 3836 MB/s USB4 performance in a rugged aluminum enclosure with a patented heatsink and upgradeable M.2 SSDs. Its larger size and potential heat under sustained loads are drawbacks. It targets pros who need fast, future-proof portable storage.
| Attribute | | |
|---|---|---|
2,000 GBbest | 4 GB | |
3,836 MB/sbest | 3,800 MB/s | |
— | 3,700 MB/sbest | |
| ↓ lower better | 253 g | 172 gbest |
2 years | 5 yearsbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
General(1) | ||
Warranty (years) | 2 years | 5 years |
Connectivity(1) | ||
Interface | USB4 | USB4 Gen 3x2 |
Build & Design(3) | ||
Weight (g) | 253 g | 172 g |
Dimensions (L×W×H) (mm) | 5.1 x 2.7 x 0.9 inches mm | 101x53x10 mm mm |
Enclosure Material | Aluminum | silicone shell, aluminum chassis |
Storage(1) | ||
Capacity (GB) | 2000 GB | 4 GB |
Performance(1) | ||
Sequential Read Speed (MB/s) | 3836 MB/s | 3800 MB/s |
Products in the top-left offer the best value (high score, low price).
Professional reviewers praise the Express 1M2 for its blistering USB4 speeds, robust aluminum heatsink that prevents throttling, and the flexibility of a user-replaceable SSD. They position it as a high-performance tool for DITs and video editors needing fast off-loads, while noting the trade-off of increased size and heat under sustained load.
Early consumer feedback is limited but generally positive, highlighting the fast transfer rates, lightweight empty chassis, and easy plug-and-play use. Common concerns revolve around heat generation, the need to reformat for Windows, and the lack of extensive user reviews due to its recent launch.
“"incredible"”
“"maximum offload speeds faster than Thunderbolt"”
“"compact, low-weight portability (~150g empty)"”
Professional reviewers commend the Extreme PRO USB4 SSD for its Thunderbolt-class speeds, rugged construction, and real-world bandwidth that validates the advertised numbers. However, they caution that the full performance envelope is only reachable on USB4 or Thunderbolt 4 hosts, and that 4K random write performance has slipped compared to earlier USB 3.2 models, with endurance data still missing.
Everyday users largely echo the reviewers' praise for blazing transfer rates and the drive's durability, especially for on-the-go creators. The most common complaints revolve around slower speeds on legacy ports and the absence of clear endurance specifications, though no widespread reliability issues have been reported.
