SanDisk Ultra 512GB
Score: 77/100
PNY Turbo Attache 3 512GB
Score: 58/100Rankings
The SanDisk Ultra 512 GB USB 3.0 flash drive offers a high capacity and solid read performance with built-in encryption, all in a compact slide-to-reveal design. It is backed by a five-year warranty but lags in sustained write speed and lacks an activity LED or USB-C connector.
The PNY 512GB Turbo Attaché 3 offers high capacity and decent read speeds in a capless sliding design, but its bulky plastic body and lack of encryption limit its suitability for security-focused or ultra-compact needs.
| Attribute | | |
|---|---|---|
512 GBbest | 512 GBbest | |
130 MB/sbest | 100 MB/s | |
— | 30 MB/sbest | |
60 monthsbest | 12 months | |
| ↓ lower better | 20 g | 18 gbest |
| ↓ lower better | 10.7 mmbest | 133.35 mm |
| ↓ lower better | 22.1 mmbest | 99.06 mm |
| ↓ lower better | 7.9 mmbest | 11.43 mm |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Performance(2) | ||
Read Speed (MB/s) | 130 MB/s | 100 MB/s |
Write Speed (MB/s) | 12-25 MB/s | 30 MB/s |
Warranty(1) | ||
Warranty Period (months) | 60 months | 12 months |
Security(1) | ||
Encryption Support | true | false |
Physical(4) | ||
Weight (g) | 20 g | 18 g |
Length (mm) | 10.7 mm | 133.35 mm |
Width (mm) | 22.1 mm | 99.06 mm |
Height (mm) | 7.9 mm | 11.43 mm |
Compatibility(1) | ||
Operating System Compatibility | Windows, macOS, Linux | Windows, macOS |
Products in the top-left offer the best value (high score, low price).
Professional reviewers praise the Ultra CZ48 series for its reliable read performance, solid 5-year warranty and the rare inclusion of useful encryption software, positioning it as a good value mid-tier flash drive. They caution that the advertised 130 MB/s read speed is achievable only under optimal conditions, the write speed lags behind premium competitors, and the lack of USB-C limits its appeal for newer laptops.
Everyday users rate the drive 4.6-4.8 stars, highlighting its ease of use, fast large-file transfers and the convenience of built-in encryption. Recurring complaints focus on slower write speeds, exFAT compatibility limits with entertainment devices, and the physical width making insertion into cramped ports tricky.
“Users consistently rate the drive highly (4.6-4.8 stars across retailers) for ease of use, speed, and storage capacity.”
“Many appreciate the secure encryption feature, with verified purchasers noting it's easy to set up and works without needing an internet connection.”
“The slide-out shape can be too wide for tightly spaced USB ports.”
Professional reviewers consider the Turbo Attaché 3 a solid mid-tier flash drive, highlighting its 100 MB/s read speed, plug-and-play simplicity and broad OS support, while noting the lack of hardware encryption and modest plastic construction.
Everyday users overwhelmingly praise the drive's speed, capacity and convenient sliding design, awarding it an average of 4.6 / 5 stars, though complaints focus on its bulky width, cheap plastic feel, and absence of clear write-speed specifications.
