Transcend ESD270C 250GB
Score: 68/100
Netac ZX20 512GB
Score: 50/100Rankings
The Transcend ESD270 250 GB offers a pocket-sized form factor, solid 520 MB/s read speeds and built-in 256-bit AES hardware encryption, making it ideal for users who prioritize security and portability over raw performance. Its slower write speeds and lack of wireless features keep it from being a flagship performer.
The Netac ZX20 512 GB Extreme Portable SSD offers flagship-class read/write speeds in a feather-light aluminum case, but its lack of encryption and occasional thermal throttling keep it from being a universal winner.
| Attribute | | |
|---|---|---|
250 GB | 512 GBbest | |
520 MB/s | 2,000 MB/sbest | |
460 MB/s | 1,700 MB/sbest | |
| ↓ lower better | 35 gbest | 82 g |
36 monthsbest | 36 monthsbest | |
| ↓ lower better | 0 °Cbest | — |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Capacity(1) | ||
Storage Capacity (GB) | 250 GB | 512 GB |
Performance(2) | ||
Sequential Read Speed (MB/s) | 520 MB/s | 2000 MB/s |
Sequential Write Speed (MB/s) | 460 MB/s | 1700 MB/s |
Build & Design(2) | ||
Weight (g) | 35 g | 82.0 g |
Form Factor | Credit-card | Portable |
Power & Connectivity(1) | ||
Included Cable Type | USB‑C to‑C, USB‑C to‑A | USB‑C to USB‑C, USB‑C to USB‑A |
Compatibility(1) | ||
Operating System Compatibility | Windows, macOS, Linux, Android, iOS/iPadOS, ChromeOS | Windows, macOS, Linux, Android, consoles, smartphones |
Technical Specs(1) | ||
NAND Type | 3D NAND | NVMe |
Products in the top-left offer the best value (high score, low price).
Professional reviewers highlight the strong encryption and convenient one-touch backup button, while noting that raw speeds lag behind flagship models and the Android app feels unpolished.
Everyday users love the tiny size, fast backup times and built-in encryption, but they often have to reformat for certain consoles and report occasional hiccups on older USB-A ports.
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 unproven long-term endurance.
Everyday users overwhelmingly praise the drive's speed, pocket-size form factor, and the inclusion of both Type-C and Type-A cables, though some report warm temperatures during long transfers and occasional recognition issues with older hardware.
“Fits in my wallet-perfect for carrying work files.”
“Backed up 100GB of photos in under 4 minutes.”
“Love the encryption feature-feels secure for sensitive documents.”
