Average Bench: 77% (6th of 639)

Based on 1,416 user benchmarks.  Device: VID 0781 PID 5588 Model: SanDisk ExtremePro
Poor: 16%Average: 77% Great: 122%

Good average bench

The SanDisk Extreme Pro USB 3.0 128GB averaged 22.9% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the SanDisk Extreme Pro USB 3.0 128GB near the top of the comparison list.


Avg. 4K-64Thread Write Speed 11.9MB/s
Avg. 4K-64Thread Mixed IO Speed 9.36MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the SanDisk Extreme Pro USB 3.0 128GB is 106%. This is a particularly wide range which indicates that the SanDisk Extreme Pro USB 3.0 128GB performs inconsistently under varying real world conditions.


Avg. Sequential Mixed IO Speed 43.8MB/s
Avg. 4K Random Read Speed 8.28MB/s

Average Bench

(Based on 1,416 samples)
Min Avg Max
14.5 Read 154 251
5 Write 93.6 215
2 Mixed 43.8 121
9.31 SusWrite 120 228
129% 103 MB/s
Min Avg Max
2.11 4K Read 8.28 12.4
0.4 4K Write 8.65 11.7
2.36 4K Mixed 6.76 8.8
555% 7.9 MB/s
Min Avg Max
8.7 DQ Read 10.9 12.8
9.98 DQ Write 11.9 12.7
7.5 DQ Mixed 9.36 10.5
763% 10.7 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
79GB free (System drive), PID 5588
Operating at USB 3.0 Speed
SusWrite @10s intervals: 6.6 12 32 42 71 73 MB/s
Read 22.8
Write 3.8
Mixed 0.3
SusWrite 39.3
21% 16.5 MB/s
4K Read 4
4K Write 10
4K Mixed 6.3
569% 6.77 MB/s
DQ Read 9.1
DQ Write 11.1
DQ Mixed 7.8
677% 9.33 MB/s
85GB free, PID 5588
Operating at USB 2.1 Speed
SusWrite @10s intervals: 38 40 38 40 40 40 MB/s
Read 39.5
Write 38.7
Mixed 27.8
SusWrite 39.3
49% 36.3 MB/s
4K Read 10.4
4K Write 7.5
4K Mixed 7.5
549% 8.47 MB/s
80GB free (System drive), PID 5588
Operating at USB 3.0 Speed
SusWrite @10s intervals: 0.8 3.9 6.4 12 0.2 MB/s
Read 3.8
Write 1.5
Mixed 9
SusWrite 5.4
7% 4.93 MB/s
4K Read 1
4K Write 0.6
4K Mixed 1.9
89% 1.17 MB/s
1,416 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.
  • - SkillBench (space shooter) tests user input accuracy.
  • - Reports are generated and presented on userbenchmark.com.
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USB Flash Drive Rankings (Price vs Performance) August 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.


2 months ago.

got it for 5 years and still totally satisfied great product


22 months ago.

isse achha toh 500 GB ki SSD na le lu BC.


8 months ago.

Best speeds for xfering data on a thumb drive.


3 months ago.

does what it says on the box :D

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 i5-11600K $270Nvidia RTX 3070 $500Crucial MX500 250GB $45
Intel Core i5-11400F $260Nvidia RTX 3060-Ti $400Samsung 860 Evo 250GB $52
Intel Core i7-11700K $360Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $183
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $31Corsair Vengeance LPX DDR4 3000 C15 2x8GB $80SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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