Average Bench: 64.1% (9th of 639)

Based on 347 user benchmarks.  Device: VID 0781 PID 5588 Model: SanDisk Extreme Pro
Poor: 18%Average: 64.1% Great: 123%

Above average average bench

The SanDisk Extreme Pro USB 3.1 256GB averaged 35.8% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.


Avg. 4K-64Thread Write Speed 11.1MB/s
Avg. 4K-64Thread Mixed IO Speed 9.11MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the SanDisk Extreme Pro USB 3.1 256GB is 105%. This is a particularly wide range which indicates that the SanDisk Extreme Pro USB 3.1 256GB performs inconsistently under varying real world conditions.


Avg. Sequential Mixed IO Speed 49.5MB/s
Avg. 4K Random Read Speed 7.83MB/s

Average Bench

(Based on 347 samples)
Min Avg Max
27.1 Read 140 291
11.3 Write 71.2 214
1.75 Mixed 49.5 173
17.8 SusWrite 90.6 267
108% 87.8 MB/s
Min Avg Max
2.86 4K Read 7.83 11.9
0.3 4K Write 7.24 11.7
2.15 4K Mixed 6.51 9.8
497% 7.2 MB/s
Min Avg Max
7.57 DQ Read 11 13.9
5.42 DQ Write 11.1 12.7
5.05 DQ Mixed 9.11 11.4
727% 10.4 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
235GB free, PID 5588
Operating at USB 2.1 Speed
SusWrite @10s intervals: 25 25 25 25 25 25 MB/s
Read 38.2
Write 37.2
Mixed 35.8
SusWrite 24.6
46% 34 MB/s
4K Read 7.5
4K Write 10.4
4K Mixed 7.4
633% 8.43 MB/s
DQ Read 9
DQ Write 11.3
DQ Mixed 8.8
717% 9.7 MB/s
347 MORE »


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How Fast Is Your USB? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

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How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.
USB Flash Drive Rankings (Price vs Performance) April 2021 USB Rankings.

We highlight the best USB flash drive in terms of balanced performance and value for money using current prices, sequential read, sequential write , 4k read and 4k write speed. The speeds are combined to form a single effective speed which measures performance for tasks such as copying photos, music and videos. Effective speed is adjusted by current price and capacity to yield value for money. Finally thousands of individual user ratings are used to validate our benchmark figures. [USBFlashPro]


Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.


Added n/a ago.


22 months ago.

Fastest and most stable USB I've ever used, perfect for USB OS installations as it performs almost the same as an internal hard drive.

639 Drives (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different USBs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

 Frequently Asked Questions

 Best User Rated

The Best.
Intel Core i5-11400F $180Nvidia RTX 3070 $500Crucial MX500 250GB $49
Intel Core i5-11600K $265Nvidia RTX 3060-Ti $400Samsung 850 Evo 120GB $78
Intel Core i5-10600K $215Nvidia GTX 1660S (Super) $240Samsung 860 Evo 250GB $50
Seagate Barracuda 1TB (2016) $38Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $73SanDisk Extreme 32GB $28
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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