SanDisk Ultra Dual Drive Go 128GB Black
Score: 84/100
Zarmst USB-C 4-in-1 Flash Drive 256GB Blue
Score: 69/100Rankings
The SanDisk Ultra Dual Drive Go 128 GB combines USB-A and USB-C connectors in a swivel design, providing up to 400 MB/s read speeds and lightweight portability. Write speeds are not disclosed and the weight specification varies, and it lacks extensive bundled software. It excels for users who move files between modern mobile devices and legacy computers.
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 | | |
|---|---|---|
128 GB | 256 GBbest | |
400 MB/sbest | 80 MB/s | |
— | 30 MB/sbest | |
| ↓ lower better | 5.1 gbest | 32 g |
5 yearsbest | — |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Storage(1) | ||
Storage Capacity (GB) | 128 GB | 256 GB |
Performance(1) | ||
Read Speed (MB/s) | 400 MB/s | 80 MB/s |
Connectivity(2) | ||
USB Version | USB 3.2 Gen 1 | USB 3.0 |
Interface | USB Type-A, USB Type-C | Lightning, Micro USB, USB-C, USB-A |
General(1) | ||
OS Compatibility | Android, iOS, Windows 7+, macOS 10.9+, smartphones, tablets with USB Type-C | iPhone, iPad, Android (OTG), PC, Mac |
Build & Design(2) | ||
Weight (g) | 5.1 g | 32 g |
Dimensions (L×W×H) (mm) | 44.1×12.1×8.6 mm mm | 42.93×22.10×5.08 mm mm |
Software(1) | ||
Included Software | SanDisk Memory Zone app | EasyFlash Pro |
Products in the top-left offer the best value (high score, low price).
Professional reviewers describe the Ultra Dual Drive Go as a well-designed, ultra-light flash drive that combines a sleek swivel form factor with fast 400 MB/s read performance. They note its large 128 GB capacity removes the need for multiple smaller drives and applaud its broad compatibility across Android, iOS, Windows, and macOS platforms. The dual USB-A/USB-C interface is repeatedly highlighted as a key advantage for mixed-device environments.
Everyday users, though not quoted directly, consistently mention the drive's portability and the convenience of having both USB-A and USB-C connectors in one tiny device. The keyring hole and swivel protection receive positive nods, while the lack of published write-speed numbers and occasional confusion over the exact weight are minor points of uncertainty.
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.
