
PNY Turbo Attache 3 256GB Gray
Score: 71/100
SanDisk Ultra Dual Drive Go 128GB Black
Score: 84/100Rankings

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 PNY Turbo Attache 256 GB USB 3.0 flash drive offers a sizable 256 GB capacity with fast 185 MB/s read speeds and a convenient capless sliding design. Its write speed is modest and it lacks advanced features such as encryption or waterproofing. Ideal for office and home users needing portable high-capacity storage.
| Attribute | ![]() | ![]() |
|---|---|---|
256 GBbest | 128 GB | |
185 MB/s | 400 MB/sbest | |
135 MB/sbest | — | |
| ↓ lower better | 18.1 g | 5.1 gbest |
1 years | 5 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) | ||
Read Speed (MB/s) | 185 MB/s | 400 MB/s |
Connectivity(2) | ||
USB Version | USB 3.0 | USB 3.2 Gen 1 |
Interface | Type A | USB Type-A, USB Type-C |
General(2) | ||
Warranty (years) | 1 years | 5 years |
OS Compatibility | Windows, macOS | Android, iOS, Windows 7+, macOS 10.9+, smartphones, tablets with USB Type-C |
Build & Design(2) | ||
Weight (g) | 18.1 g | 5.1 g |
Dimensions (L×W×H) (mm) | 57.4 x 10.96 x 20.33 mm | 44.1×12.1×8.6 mm mm |
Power(1) | ||
Operating Temperature (°C) | 0-60 °C | 0°C to 45°C °C |

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.

