SanDisk Extreme PRO 4TB USB-C
Score: 85/100
Lexar SL400
Score: 76/100Rankings
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 Lexar SL400 2TB Portable SSD combines a high-speed 1050 MB/s read drive with an integrated 4-port USB-C hub, delivering fast performance and versatile connectivity. Its trade-offs include a modest 1-year warranty and limited rugged features compared to premium enclosures. Ideal for content creators needing portable, hub-enabled storage.
| Attribute | | |
|---|---|---|
4 GB | 2,000 GBbest | |
3,800 MB/sbest | 1,050 MB/s | |
3,700 MB/sbest | 1,000 MB/s | |
| ↓ lower better | 172 g | 159 gbest |
5 yearsbest | 1 years | |
— | 1 mbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
General(1) | ||
Warranty (years) | 5 years | 1 years |
Connectivity(1) | ||
Interface | USB4 Gen 3x2 | USB-C |
Build & Design(2) | ||
Weight (g) | 172 g | 159 g |
Dimensions (L×W×H) (mm) | 101x53x10 mm mm | 125.0 x 100.1 x 35.1 mm mm |
Storage(1) | ||
Capacity (GB) | 4 GB | 2000 GB |
Performance(2) | ||
Sequential Read Speed (MB/s) | 3800 MB/s | 1050 MB/s |
Sequential Write Speed (MB/s) | 3700 MB/s | 1000 MB/s |
Products in the top-left offer the best value (high score, low price).
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.
