Netac ZX20 512GB
Score: 69/100
Corsair EX400U 2TB
Score: 74/100Rankings
The Corsair EX400U is an ultra-compact USB4 SSD delivering some of the fastest portable read speeds on the market and a unique MagSafe feature for iPhone creators, though it lacks ruggedness and full write-speed potential.
The Netac ZX20 512 GB Extreme Portable SSD delivers flagship-class NVMe speeds in a lightweight, aluminum-cased package, making it ideal for professionals needing rapid data transfers. Its lack of encryption, possible thermal throttling, and heavier weight compared to some rivals are trade-offs to consider.
| Attribute | | |
|---|---|---|
512 GB | 2,048 GBbest | |
2,000 MB/s | 4,000 MB/sbest | |
1,700 MB/s | 3,600 MB/sbest | |
3 yearsbest | 3 yearsbest | |
| ↓ lower better | 82 gbest | 92 g |
| ↓ lower better | 8 mmbest | 11.9 mm |
| ↓ lower better | 71.5 mm | 64.3 mmbest |
| ↓ lower better | 43.5 mmbest | 64 mm |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Performance(3) | ||
Interface | USB 3.2 Gen 2 | USB4 |
Sequential Read Speed (MB/s) | 2000 MB/s | 4000 MB/s |
Sequential Write Speed (MB/s) | 1700 MB/s | 3600 MB/s |
Compatibility(1) | ||
Supported Operating Systems | Windows, macOS, Linux, Android, gaming consoles, smartphones with USB OTG | Windows, macOS, iOS |
Storage(2) | ||
Storage Capacity (GB) | 512 GB | 2048 GB |
NAND Type | NVMe | TLC |
Power(1) | ||
Power Source | USB | USB-C PD |
Build & Design(4) | ||
Weight (g) | 82 g | 92 g |
Thickness (mm) | 8 mm | 11.9 mm |
Length (mm) | 71.5 mm | 64.3 mm |
Width (mm) | 43.5 mm | 64 mm |
Products in the top-left offer the best value (high score, low price).
Professional reviewers note that the ZX20's NVMe-based design and USB 3.2 Gen 2 interface place it on par with flagship portable SSDs, highlighting its impressive read/write performance and excellent price-to-performance ratio, while cautioning about potential thermal throttling and limited long-term reliability data.
Everyday users overwhelmingly praise the drive's speed, pocket-size form factor, and inclusion of both Type-C and Type-A cables, but report occasional recognition problems with older hardware, warmth during long transfers, and a perception of less premium internal build.
Professional reviewers praise the EX400U's groundbreaking speed, tiny form factor, and MagSafe integration, while noting the write-speed shortfall, modest endurance, and absence of encryption or rugged features.
Users love the lightning-fast transfers and iPhone attachment, but express concerns about write-speed limits, durability, and lack of encryption.
“blazing-fast transfer speeds”
“compact size and lightweight design are ideal for travel and fieldwork”
“drive can become warm during extended transfers”
