
Thkailar USB Flash Drive 512GB Red
Score: 76/100
Lexar JumpDrive Dual Drive D400
Score: 76/100Rankings

The Thkailar 512 GB USB flash drive offers a versatile dual-port design and a robust aluminum alloy body, delivering fast read speeds up to 120 MB/s. Its write performance is modest and it lacks built-in encryption, which may concern security-focused users. Ideal for business travelers needing cross-platform compatibility.

Lexar's D400 128 GB dual-drive features a metal swivel housing, keyring loop, and built-in 256-bit AES encryption, delivering read speeds up to 130 MB/s. Write performance is slower and limited user reviews make reliability uncertain. Perfect for professionals requiring secure, cross-device file transfers.
| Attribute | ![]() | ![]() |
|---|---|---|
512 GBbest | 128 GB | |
120 MB/s | 130 MB/sbest | |
— | 52 MB/sbest | |
| ↓ lower better | 91 g | 17.8 gbest |
1 years | 5 yearsbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Storage(1) | ||
Storage Capacity (GB) | 512 GB | 128 GB |
Performance(2) | ||
Read Speed (MB/s) | 120 MB/s | 130 MB/s |
Write Speed (MB/s) | 15-55 MB/s | 52 MB/s |
Connectivity(2) | ||
USB Version | USB 3.1 | USB 3.2 Gen 1 |
Interface | USB 3.1 Type-A, USB 3.1 Type-C | USB Type-C, USB Type-A (swivel) |
General(2) | ||
Warranty (years) | 1 years | 5 years |
OS Compatibility | Windows, Linux, macOS, Android, iOS, others | Android, Windows, macOS |
Build & Design(3) | ||
Weight (g) | 91 g | 17.8 g |
Dimensions (L×W×H) (mm) | 66.0x20.3x7.6 mm | 4.0x0.4x5.45 mm |
Material | Aluminum alloy | Metal |

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

Professional reviewers commend the Thkailar 512GB drive for its fast read performance, versatile dual-port connectivity, and robust aluminum alloy build that helps manage heat during prolonged transfers. They also appreciate the plug-and-play simplicity and the durability of the metal casing, positioning it as a reliable tool for business travelers and power users.
Everyday users give the drive a high overall rating, indicating general satisfaction with its ease of use, cross-platform compatibility, and solid construction.


Tech reviewers consider the Lexar D400 a solid, secure option for users who need a durable, dual-connector flash drive. Its high read speeds and metal swivel design receive praise, while the relatively slow write performance and limited consumer feedback are noted as drawbacks.
Limited feedback; the few available sources provide no recurring praise or complaints, leaving reliability uncertain.