Average Bench: 12.3% (385th of 639)

Based on 190 user benchmarks.  Device: VID 125f PID db8a Model: ADATA USB Flash Drive
Poor: 7%Average: 12.3% Great: 22%

Terrible average bench

The Adata DashDrive UV128 USB 3.0 8GB averaged 87.7% 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 Read Speed 5.58MB/s
Avg. 4K Random Write Speed 0.39MB/s

Very good consistency

The range of scores (95th - 5th percentile) for the Adata DashDrive UV128 USB 3.0 8GB is just 14.9%. This is a relatively narrow range which indicates that the Adata DashDrive UV128 USB 3.0 8GB performs reasonably consistently under varying real world conditions.


Avg. Sequential Write Speed 8.66MB/s
Avg. Sequential Mixed IO Speed 11.1MB/s

Average Bench

(Based on 190 samples)
Min Avg Max
24.9 Read 54.5 118
4.69 Write 8.66 15.6
5.22 Mixed 11.1 18.9
6.2 SusWrite 11.4 16.6
21.5% 21.4 MB/s
Min Avg Max
2.75 4K Read 5.58 10.6
0.05 4K Write 0.39 0.77
0.01 4K Mixed 0.31 0.75
44.2% 2.09 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
2GB free, PID db8a
Operating at USB 3.0 Speed
Read 70.1
Write 10.1
Mixed 8.83
26% 29.7 MB/s
4K Read 6.13
4K Write 0.76
4K Mixed 0.62
70% 2.5 MB/s
2GB free, PID db8a
Operating at USB 3.0 Speed
Read 68.6
Write 11
Mixed 19.6
32% 33.1 MB/s
4K Read 5.87
4K Write 0.53
4K Mixed 0.62
61% 2.34 MB/s
4GB free, PID db8a
Operating at USB 2.1 Speed
Read 41.2
Write 9.94
Mixed 2.96
16% 18 MB/s
4K Read 8.76
4K Write 0.23
4K Mixed 0.25
49% 3.08 MB/s
4GB free, PID db8a
Operating at USB 2.1 Speed
SusWrite @10s intervals: 16 17 17 17 17 17 MB/s
Read 31.5
Write 19.7
Mixed 8.7
SusWrite 16.6
23% 19.1 MB/s
4K Read 2
4K Write 0.2
4K Mixed 0.8
41% 1 MB/s
3GB free, PID db8a
Operating at USB 2.1 Speed
SusWrite @10s intervals: 5.9 6.1 6.5 5.1 5.4 8 MB/s
Read 31
Write 7.2
Mixed 15.5
SusWrite 6.2
17% 15 MB/s
4K Read 3.8
4K Write 0.5
4K Mixed 0.9
62% 1.73 MB/s
190 MORE »


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USB Flash Drive Rankings (Price vs Performance) July 2018 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.
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  • Raw speed comparison - Raw speed readings.


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.

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Seagate Barracuda 3TB (2016) $74G.SKILL Trident Z DDR4 3200 C14 4x16GB $951SanDisk Extreme 32GB $46
Seagate Barracuda 2TB (2016) $59HyperX Fury DDR4 2133 C14 2x8GB $219SanDisk Ultra Fit 32GB $12
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