SanDisk Ultra 64GB
Score: 75/100
SanDisk Ultra Dual Drive 256GB USB-C Black
Score: 71/100Rankings
The SanDisk Ultra 64 GB USB-3.0 flash drive delivers solid 130 MB/s read speeds, a convenient capless slide-out design, and built-in encryption and recovery software. Its write speed tops out at 40 MB/s and performance can drop on older USB-2.0 ports, while the 64 GB capacity may be limiting for larger libraries. Best suited for students and professionals needing portable, secure storage.
The SanDisk Ultra Dual Drive 256 GB combines USB-A and USB-C connectors in a retractable design, delivering up to 150 MB/s read speeds and a 5-year warranty. It lacks waterproofing, hardware encryption, and detailed write-speed specifications, which may limit its appeal for power users. Best suited for mobile users who need quick cross-platform file transfers and a compact, high-capacity drive.
| Attribute | | |
|---|---|---|
64 GB | 256 GBbest | |
130 MB/s | 150 MB/sbest | |
40 MB/sbest | — | |
| ↓ lower better | 8.5 gbest | 9.1 g |
5 yearsbest | 5 yearsbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Storage(1) | ||
Storage Capacity (GB) | 64 GB | 256 GB |
Performance(1) | ||
Read Speed (MB/s) | 130 MB/s | 150 MB/s |
Connectivity(2) | ||
USB Version | USB 3.0 | USB 3.1 Gen 1 |
Interface | USB Type-A | USB |
General(1) | ||
OS Compatibility | Windows 10+, macOS 12+, Android 8+, iOS 13+, USB Type-A | Android, iOS |
Build & Design(2) | ||
Weight (g) | 8.5 g | 9.1 g |
Dimensions (L×W×H) (mm) | 69.09×22.1×9.91 mm mm | 38.1x20.7x9.4 mm |
Power(1) | ||
Operating Temperature (°C) | 0 – 45 °C °C | 0-45 °C |
Features(1) | ||
Hardware Encryption | true | false |
Products in the top-left offer the best value (high score, low price).
Professional reviewers consistently commend the SanDisk Ultra 64GB USB-A flash drive for its solid 130 MB/s read performance, reliable 40 MB/s write speed, and the added value of security and recovery software. They note the longer 5-year warranty as a differentiator, while pointing out the lack of detailed endurance data and the drop in speed on legacy USB 2.0 ports.
Everyday users love the fast read speeds and the generous 64 GB capacity for media and backups, highlighting the convenient capless slide-out design and the usefulness of SecureAccess. Common complaints revolve around slower write speeds, occasional recognition hiccups on older ports, and the fact that formatted usable space is a few gigabytes less than the advertised capacity.
“up to 100-130MB/s feels blazing for files/movies”
“full movie in <40s”
Professional reviewers highlight the high read-speed performance and the convenience of dual connectors, but note the lack of detailed write-speed information and limited durability features in the base model.
Everyday users appreciate the convenience of quickly offloading phone media and the portable design, while some express disappointment with slower real-world speeds and wish for better ruggedness or security features.
