Zarmst USB-C 4-in-1 Flash Drive 256GB Blue
Score: 69/100
Amazon Basics USB Flash Drive 512GB
Score: 80/100Rankings
The Amazon Basics LS25USBC512G1 offers impressive sequential speeds above 400 MB/s in a compact dual-port metal design. Its limitations include modest random-access performance and a short 1-year warranty. It is best for users who need fast large-file transfers across USB-C and USB-A devices.
The ZARMST 256 GB 4-in-1 flash drive offers a versatile multi-connector design and an encryption app, making cross-platform storage convenient. However, its real-world transfer speeds fall short of claims and it can become hot during use. Best suited for users needing occasional backups across devices.
| Attribute | | |
|---|---|---|
256 GB | 512 GBbest | |
80 MB/s | 415 MB/sbest | |
30 MB/s | 421 MB/sbest | |
| ↓ lower better | 32 g | 17.96 gbest |
— | 1 yearsbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Storage(1) | ||
Storage Capacity (GB) | 256 GB | 512 GB |
Performance(2) | ||
Read Speed (MB/s) | 80 MB/s | 415 MB/s |
Write Speed (MB/s) | 30 MB/s | 421 MB/s |
Connectivity(2) | ||
USB Version | USB 3.0 | USB 3.2 Gen 2 |
Interface | Lightning, Micro USB, USB-C, USB-A | Dual |
Build & Design(2) | ||
Weight (g) | 32 g | 17.96 g |
Material | Aluminum frosted | Metal |
Products in the top-left offer the best value (high score, low price).
Professional reviewers commend the ZARMST drive for its versatile 4-in-1 connector layout, compact thumb-drive form factor, and the security-focused app that adds encryption and fingerprint unlocking. However, they criticize the gap between advertised and real-world speeds, heat generation during transfers, case-related compatibility issues, and raise doubts about the true usable capacity and overall build durability.
Everyday users love the convenience of a single drive that works across iPhone, Android and computers, especially the one-click backup app and the ability to move large media files via USB 3.0. Recurring complaints focus on slower-than-expected transfer speeds, the device heating up, incompatibility with phones in cases, and uncertainty about whether the full 256 GB is actually usable.
Professional reviewers praise the LS25USBC512G1 for its impressive sequential performance, scoring 208 on SSD‑tester.com and consistently exceeding the 400 MB/s claim. They also note the robust rotating metal housing as a durability advantage, but caution that random I/O and latency are modest and the small pSLC cache may throttle sustained writes.
