Average Bench: 25.3% (144th of 639)

Based on 1,418 user benchmarks.  Device: VID 05dc PID a838 Model: Lexar USB Flash Drive
Poor: 9%Average: 25.3% Great: 43%

Very poor average bench

The Lexar USB Flash Drive 128GB averaged 74.6% 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. Sequential Mixed IO Speed 47.9MB/s
Avg. Sequential Write Speed 47MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Lexar USB Flash Drive 128GB is 33.6%. This is a relatively narrow range which indicates that the Lexar USB Flash Drive 128GB performs reasonably consistently under varying real world conditions.


Avg. 4K Random Read Speed 3.6MB/s
Avg. Sequential Read Speed 80.4MB/s

Average Bench

(Based on 1,418 samples)
Min Avg Max
28.7 Read 80.4 140
7.46 Write 47 103
10.6 Mixed 47.9 90.8
13.5 SusWrite 45.9 76.5
69.9% 55.3 MB/s
Min Avg Max
1.84 4K Read 3.6 6.47
0.003 4K Write 0.68 1.4
0.11 4K Mixed 0.67 1.3
59.2% 1.65 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
42GB free, PID a838
SusWrite @10s intervals: 19 19 19 19 19 19 MB/s
Read 115
Write 20.5
Mixed 10.2
SusWrite 19.2
39% 41.1 MB/s
4K Read 6.6
4K Write 0.3
4K Mixed 2.6
123% 3.17 MB/s
117GB free, PID a838
Operating at USB 2.1 Speed
SusWrite @10s intervals: 35 35 36 13 15 33 MB/s
Read 36.8
Write 35.3
Mixed 34.3
SusWrite 27.7
45% 33.5 MB/s
4K Read 3.8
4K Write 0.7
4K Mixed 1.1
75% 1.87 MB/s
1,418 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.

UserBenchmark of the month

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) October 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.
  • 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 i7-8700K $370Nvidia GTX 1070 $319Samsung 850 Evo 250GB $78
AMD Ryzen 5 1600 $155Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $120
Intel Core i7-7700K $355AMD RX 480 $280Samsung 850 Pro 256GB $163
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $140SanDisk Extreme 64GB $42
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $55Corsair Vengeance LPX DDR4 3200 C16 2x8GB $145SanDisk Ultra Fit 32GB $12
Today's hottest deals
User Guide  •  About  •  FAQs  •  Email  •  Privacy  •  Developer Feedback