Zarmst USB-C 4-in-1 Flash Drive 256GB Blue
Score: 69/100
Techkey USB Flash Drive 128GB
Score: 79/100Rankings
The Techkey 128 GB MFi-certified flash drive offers versatile three-in-one connectivity and a rugged metal build, delivering fast USB 3.0 speeds. Its main drawbacks are the mandatory iOS app and the lack of detailed size/weight specs. Ideal for travelers and iOS users who need a durable, cross-platform backup solution.
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 GBbest | 128 GB | |
80 MB/sbest | 80 MB/sbest | |
30 MB/s | 40 MB/sbest | |
| ↓ lower better | 32 gbest | — |
— | 2 yearsbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Storage(1) | ||
Storage Capacity (GB) | 256 GB | 128 GB |
Performance(1) | ||
Write Speed (MB/s) | 30 MB/s | 40 MB/s |
Connectivity(1) | ||
Interface | Lightning, Micro USB, USB-C, USB-A | USB 3.0, Lightning, USB-C |
General(1) | ||
OS Compatibility | iPhone, iPad, Android (OTG), PC, Mac | iOS, Android, macOS, Windows |
Build & Design(2) | ||
Dimensions (L×W×H) (mm) | 42.93×22.10×5.08 mm mm | 3.94 x 0.03937 x 5.43 inches mm |
Material | Aluminum frosted | Metal |
Software(1) | ||
Included Software | EasyFlash Pro | BLANBOK+, U‑Disk |
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.
“USB 3.0 speed is very fast on computers.”
“NWT, ideal for travel.”
Professional reviewers highlight the drive's very fast USB 3.0 performance and the convenience of having Lightning, USB-C and USB 3.0 ports in a single, rugged package, while noting that the mandatory BLANBOK+ app on iOS adds a setup step and that independent testing is limited.
Everyday users praise the drive for quick, one-click backups and seamless cross-platform file transfers, especially while traveling, and they value the durable metal build; no major complaints are repeatedly mentioned beyond the required app for iOS.
