SanDisk Ultra Dual Drive Go 128GB Black
Score: 84/100
Techkey USB Flash Drive 128GB
Score: 79/100Rankings
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 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.
| Attribute | | |
|---|---|---|
128 GBbest | 128 GBbest | |
400 MB/sbest | 80 MB/s | |
— | 40 MB/sbest | |
| ↓ lower better | 5.1 gbest | — |
5 yearsbest | 2 years |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
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 | USB 3.0, Lightning, USB-C |
General(2) | ||
Warranty (years) | 5 years | 2 years |
OS Compatibility | Android, iOS, Windows 7+, macOS 10.9+, smartphones, tablets with USB Type-C | iOS, Android, macOS, Windows |
Build & Design(1) | ||
Dimensions (L×W×H) (mm) | 44.1×12.1×8.6 mm mm | 3.94 x 0.03937 x 5.43 inches mm |
Software(1) | ||
Included Software | SanDisk Memory Zone app | BLANBOK+, U‑Disk |
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.
“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.
