Average Bench: 25.6% (149th of 639)

Based on 7,502 user benchmarks.  Device: VID 0781 PID 5591 Model: SanDisk Ultra USB 3.0
Poor: 12%Average: 25.6% Great: 40%

Very poor average bench

The SanDisk Ultra Flair USB 3.0 32GB averaged 74.4% 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 Random Mixed IO Speed 2.82MB/s
Avg. 4K Random Write Speed 2.58MB/s

Good consistency

The range of scores (95th - 5th percentile) for the SanDisk Ultra Flair USB 3.0 32GB is 27.7%. This is a relatively narrow range which indicates that the SanDisk Ultra Flair USB 3.0 32GB performs reasonably consistently under varying real world conditions.


Avg. Sustained Write Speed 23.6MB/s
Avg. Sequential Read Speed 78.2MB/s

Average Bench

(Based on 7,502 samples)
Min Avg Max
25.9 Read 78.2 160
15.2 Write 41 99.9
16.7 Mixed 47 108
13.4 SusWrite 23.6 37.3
57.8% 47.5 MB/s
Min Avg Max
3.1 4K Read 4.94 6.8
0.5 4K Write 2.58 3.8
0.9 4K Mixed 2.82 4.3
202% 3.45 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
29GB free, PID 5591
Operating at USB 2.1 Speed
SusWrite @10s intervals: 25 25 25 23 14 14 MB/s
Read 35.8
Write 24.8
Mixed 27.8
SusWrite 21.1
36% 27.4 MB/s
4K Read 5.8
4K Write 3.5
4K Mixed 4
277% 4.43 MB/s
23GB free, PID 5591
Operating at USB 2.1 Speed
SusWrite @10s intervals: 23 24 24 24 16 13 MB/s
Read 29.3
Write 22.1
Mixed 24.7
SusWrite 20.5
32% 24.2 MB/s
4K Read 3.6
4K Write 2.7
4K Mixed 2.6
194% 2.97 MB/s
8GB free, PID 5591
Operating at USB 2.1 Speed
SusWrite @10s intervals: 19 20 20 20 19 13 MB/s
Read 23.9
Write 18.3
Mixed 19.4
SusWrite 18.4
26% 20 MB/s
4K Read 3.8
4K Write 2.6
4K Mixed 2.8
198% 3.07 MB/s
7,502 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

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  • - CPU tests include: integer, floating and string.
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  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
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  • - Share your opinion by voting.
USB Flash Drive Rankings (Price vs Performance) June 2020 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.


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

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The Best.
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Intel Core i7-9700K $370Nvidia RTX 2070S (Super) $500Samsung 860 Evo 250GB $56
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WD Blue 1TB (2012) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $75SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $681SanDisk Ultra Fit 32GB $16
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