Average Bench: 27% (131st of 639)

Based on 6,053 user benchmarks.  Device: VID 0781 PID 5591 Model: SanDisk Ultra USB 3.0
Poor: 11%Average: 27% Great: 40%

Very poor average bench

The SanDisk Ultra Flair USB 3.0 64GB averaged 72.9% 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 Write Speed 1.95MB/s
Avg. 4K Random Mixed IO Speed 1.9MB/s

Good consistency

The range of scores (95th - 5th percentile) for the SanDisk Ultra Flair USB 3.0 64GB is 29.5%. This is a relatively narrow range which indicates that the SanDisk Ultra Flair USB 3.0 64GB performs reasonably consistently under varying real world conditions.


Avg. Sustained Write Speed 26.9MB/s
Avg. 4K Random Read Speed 4.95MB/s

Average Bench

(Based on 6,053 samples)
Min Avg Max
25.3 Read 96.5 163
12.8 Write 43.7 99.8
14.6 Mixed 49.8 106
11.6 SusWrite 26.9 41.8
64.4% 54.2 MB/s
Min Avg Max
2.3 4K Read 4.95 6.9
0.5 4K Write 1.95 3.1
0.84 4K Mixed 1.9 3.5
149% 2.93 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
28GB free, PID 5591
Operating at USB 3.0 Speed
SusWrite @10s intervals: 59 55 23 27 24 23 MB/s
Read 105
Write 38.3
Mixed 38.7
SusWrite 35.1
62% 54.2 MB/s
4K Read 2.5
4K Write 1.3
4K Mixed 1.5
104% 1.77 MB/s
32GB free, PID 5591
Operating at USB 2.1 Speed
SusWrite @10s intervals: 22 22 17 17 17 17 MB/s
Read 36
Write 19.5
Mixed 25.3
SusWrite 18.8
32% 24.9 MB/s
4K Read 6.4
4K Write 2.2
4K Mixed 1.7
156% 3.43 MB/s
6,053 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) November 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

 Best User Rated

The Best.
Intel Core i5-9600K $190Nvidia RTX 3070 $500Crucial MX500 250GB $34
Intel Core i5-9400F $150Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $78
Intel Core i5-10600K $260Nvidia GTX 1650S (Super) $190Samsung 860 Evo 250GB $50
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3200 C16 2x8GB $64SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $71SanDisk Extreme 32GB $28
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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