Real World Speed
Performance profile from 1,994 user samples
1,375 User Benchmarks
Best Bench: 79% 15GB free, PID 5580 @USB 3.0
Worst Bench: 30% 11GB free, PID 5580 @USB 2.1
Poor: 30% Great: 79%
SPEED RANK: 13th / 634
619 User Benchmarks
Best Bench: 33% 13GB free, PID 0243 @USB 3.0
Worst Bench: 7% 4GB free, PID 0243 @USB 2.1
Poor: 7% Great: 33%
SPEED RANK: 298th / 634
Effective Speed
Effective USB Speed
76.6 % Hugely faster effective speed.
27 %
Peak Sequential Read Speed
196 MB/s Hugely faster peak read speed.
81 MB/s
Peak Sequential Write Speed
62 MB/s Much faster peak write speed.
45 MB/s
4K Read
Peak 4K Random Read Speed
15.3 MB/s Hugely faster peak random read.
4.6 MB/s
4K Write
Peak 4K Random Write Speed
10.1 MB/s Hugely faster peak random write.
1.43 MB/s
Value For Money
36.3 % Better value.
28.7 %
User Rating
UBM User Rating
67 % Slightly more popular.
59 %
Price (score)
$18 $8 Much cheaper.
69 Months +1% 70 Months
16GB 16GB

The benchmark scores for the SanDisk Extreme were stunning. Until now every flash drive we have tested has shown a serious weakness in the area of 4K random writes. The SanDisk Extreme achieved a 4K random write speed of 2.1 MB/s which was over three times faster than the best of the rest, unfortunately we were unable to get consistent measurements but 2.1 MB/s was towards at the lower end of the range (10.8 MB/s - 1.71 MB/s) we observed. We suspect the inconsistency relates to the way the controller batches page cleanup. The other benchmark observations were all consistent and to date this drive has the highest sequential read we have seen on a 16GB flash drive. The SanDisk Extreme has not been released in the UK. Our test unit had to be shipped from Hong Kong where we were able to purchase it at at an extremely reasonable price. We will update the price if/when the drive becomes officially available in the UK ... [Jul '12 USBFlashPro]


The Store n Go had a quirky performance profile. For its price the drive shone in the CrystalDiskMark and ATTO tests but the AS-SSD real world speed test revealed that the drive was less able to both read and write at the same time. It might be best to avoid this drive if you plan to run applications or host an operating system. Our tests showed the drive outperforming Verbatim's claimed write speed by a factor of three, an unusual result. There are several versions of this drive going by the same name, some with an LED, some without and all with vastly varying speed profiles. Our test drive performed at the top end of the speed range we have seen. Overall, given the low price but inconsistent results, we consider this drive average at best and a somewhat risky purchase.  [Oct '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.

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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.

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Intel Core i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $85
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $335Samsung 850 Evo 500GB $146
AMD Ryzen 5 1600 $189AMD RX 480 $400Samsung 850 Pro 256GB $125
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $198SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 7200.14 1TB $51Corsair Vengeance LPX DDR4 3200 C16 2x8GB $205SanDisk Extreme 16GB $18
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