
Kingston XS1000R 2TB
Score: 89/100
Corsair EX400U 2TB
Score: 84/100Rankings

The Kingston XS1000R 2TB is a pocket-sized external SSD that delivers industry-leading 1,050 MB/s read speeds in a featherweight metal-plastic chassis. Its main trade-offs are the need for a USB 3.2 Gen 2 host to hit peak performance and the lack of an included protective case. Ideal for travelers and mobile professionals who need fast, high-capacity storage on the go.

The Corsair EX400U 2TB delivers blazing USB4 performance up to 4,000 MB/s read and includes MagSafe compatibility in a tiny 64 mm square case. It lacks an IP rating and rugged drop protection, and carries a premium price. Perfect for professionals needing near-internal speeds on modern USB4 devices.
| Attribute | ![]() | ![]() |
|---|---|---|
2,000 GBbest | 2,000 GBbest | |
1,050 MB/s | 4,000 MB/sbest | |
1,000 MB/s | 3,600 MB/sbest | |
| ↓ lower better | 28.7 gbest | 92 g |
5 yearsbest | 3 years |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
General(2) | ||
Warranty (years) | 5 years | 3 years |
Operating Temperature (°C) | 0-40 °C | 0-70 °C |
Connectivity(2) | ||
Interface | USB 3.2 Gen 2 | USB4 Type‑C |
OS Compatibility | Windows 11/10, macOS 11.15+, Linux 4.4+, Chrome OS, Android, iOS/iPadOS 13+ | Windows, macOS, iOS/iPadOS |
Build & Design(3) | ||
Weight (g) | 28.7 g | 92 g |
Dimensions (L×W×H) (mm) | 69.6×32.5×13.5 mm mm | 64.3×64×12 mm mm |
Enclosure Material | Metal + plastic | Aluminum top, plastic sides and bottom |
Accessories(1) | ||
Included Accessories | 12" USB Type‑C to USB‑A cable; USB‑A to USB‑C adapter | 30 cm USB‑C to USB‑C cable (40 Gbps, 60 W PD), 7 cm USB‑C cable with 90° connector |
Performance(2) | ||
Sequential Read Speed (MB/s) | 1050 MB/s | 4000 MB/s |
Sequential Write Speed (MB/s) | 1000 MB/s | 3600 MB/s |


Products in the top-left offer the best value (high score, low price).

Professional reviewers commend the XS1000R for its ultra-lightweight metal/plastic build, fast 1,050/1,000 MB/s performance and broad OS support, positioning it as a highly portable solution for professionals. Their main criticisms focus on the lack of an included protective case and the need for a USB 3.2 Gen 2 host to realize full speeds, with some noting inconsistent weight reporting.
Everyday users consistently praise the drive's tiny size, featherweight feel, fast transfers and plug-and-play simplicity, especially on smartphones and laptops. Recurring complaints revolve around the missing protective case, slower speeds on legacy ports, and occasional confusion over the listed weight.

Professional reviewers praise the EX400U for its tiny footprint, blazing USB4 performance, and hassle-free plug-and-play experience. The inclusion of a full-length 40 Gbps cable and the ability to operate without a separate power brick were highlighted as strong points, while the drive's speed is consistently described as comparable to internal SSDs.

