Real World Speed
Performance profile from 990 user samples
680 User Benchmarks
Best Bench: 33% 29GB free, PID db8a @USB 3.0
Worst Bench: 8% 29GB free, PID db8a @USB 2.1
Poor: 8% Great: 33%
SPEED RANK: 239th / 634
310 User Benchmarks
Best Bench: 51% 30GB free, PID 1a09 @USB 3.0
Worst Bench: 11% 24GB free, PID 1a09 @USB 2.1
Poor: 11% Great: 51%
SPEED RANK: 65th / 634
Effective Speed
Effective USB Speed
35.7 % 57.2 % Much faster effective speed.
Peak Sequential Read Speed
126 MB/s 229 MB/s Hugely faster peak read speed.
Peak Sequential Write Speed
52.9 MB/s 65.6 MB/s Faster peak write speed.
4K Read
Peak 4K Random Read Speed
8.01 MB/s 19.5 MB/s Hugely faster peak random read.
4K Write
Peak 4K Random Write Speed
1.32 MB/s 1.67 MB/s Faster peak random write.
Value For Money
62.6 % Hugely better value.
25.7 %
User Rating
UBM User Rating
62 % +3% 60 %
Price (score)
$10 Much cheaper.
60 Months Slightly more recent.
68 Months
32GB 32GB

The new Adata Dashdrive UV128 has a performance profile that closely matches its older, and recently rebranded, Dashdrive Elite S102 Pro sibling. Comparing the two shows that the drives are nearly identical except for form factor. Personally I prefer a retractable form factor as USB caps are easily lost. Overall in terms of performance the Dashdrive UV128 is slightly above average and in terms of value for money it is also reasonable. [Jul '13 USBFlashPro]


USB Flash Drive Rankings (Price vs Performance) March 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.
  • Fastest real world speed - Real World Speed measures performance for typical flash usage patterns.
  • Best value for money - Value for money is based on real world performance, price and capacity.
  • Raw speed comparison - Raw speed readings.
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.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.

 Frequently Asked Questions

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Intel Core i5-8600K $243AMD RX 480 $400Samsung 850 Pro 256GB $120
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Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $216SanDisk Extreme 16GB $18
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