Average Bench: 15% (331st of 639)

Based on 178 user benchmarks.  Device: VID 125f PID a94a Model: ADATA HDD CH94
Poor: 10%Average: 15% Great: 20%

Terrible average bench

The ADATA HDD CH94 500GB averaged 84.9% 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 1MB/s
Avg. Sustained Write Speed 33.2MB/s

Very good consistency

The range of scores (95th - 5th percentile) for the ADATA HDD CH94 500GB is just 10%. This is a relatively narrow range which indicates that the ADATA HDD CH94 500GB performs reasonably consistently under varying real world conditions.


Avg. 4K Random Read Speed 0.42MB/s
Avg. Sequential Read Speed 33MB/s

Average Bench

(Based on 178 samples)
Min Avg Max
21.7 Read 33 40
18.3 Write 31.2 40.9
4.44 Mixed 22.1 38.7
10.5 SusWrite 33.2 41.1
40.2% 29.9 MB/s
Min Avg Max
0.2 4K Read 0.42 0.5
0.29 4K Write 1 1.8
0.1 4K Mixed 0.32 0.7
46.5% 0.58 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
223GB free, PID a94a
Operating at USB 2.0 Speed
SusWrite @10s intervals: 38 40 40 40 40 40 MB/s
Read 38.3
Write 27.8
Mixed 33.3
SusWrite 39.4
47% 34.7 MB/s
4K Read 0.5
4K Write 1.9
4K Mixed 0.7
90% 1.03 MB/s
117GB free, PID a94a
Operating at USB 2.0 Speed
SusWrite @10s intervals: 40 40 40 39 39 40 MB/s
Read 37.6
Write 36.1
Mixed 28.3
SusWrite 39.6
48% 35.4 MB/s
4K Read 0.5
4K Write 1.6
4K Mixed 0.7
80% 0.93 MB/s
462GB free, PID a94a
Operating at USB 2.0 Speed
SusWrite @10s intervals: 36 37 37 37 36 36 MB/s
Read 35.6
Write 30.2
Mixed 26.5
SusWrite 36.7
43% 32.2 MB/s
4K Read 0.5
4K Write 1.7
4K Mixed 0.6
80% 0.93 MB/s
158GB free, PID a94a
Operating at USB 2.0 Speed
SusWrite @10s intervals: 24 36 36 36 36 36 MB/s
Read 30.8
Write 34
Mixed 17.5
SusWrite 34.1
40% 29.1 MB/s
4K Read 0.5
4K Write 0.4
4K Mixed 0.2
22% 0.37 MB/s
178 MORE »
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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USB Flash Drive Rankings (Price vs Performance) January 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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