Average Bench: 32.9% (72nd of 639)

Based on 51 user benchmarks.  Device: VID 0781 PID 5591 Model: SanDisk Ultra USB 3.0
Poor: 12%Average: 32.9% Great: 43%

Poor average bench

The SanDisk Ultra Flair USB 3.0 256GB averaged 67.1% 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.

Strengths

Avg. 4K Random Write Speed 1.48MB/s
Avg. 4K Random Mixed IO Speed 1.16MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the SanDisk Ultra Flair USB 3.0 256GB is 31.3%. This is a relatively narrow range which indicates that the SanDisk Ultra Flair USB 3.0 256GB performs reasonably consistently under varying real world conditions.

Weaknesses

Avg. 4K Random Read Speed 5MB/s
Avg. Sustained Write Speed 38.7MB/s
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Average Bench

(Based on 51 samples)
Min Avg Max
26.3 Read 125 160
14.1 Write 47 64.1
17.2 Mixed 54.1 87.8
13.9 SusWrite 38.7 49.7
76.9% 66.2 MB/s
Min Avg Max
3.28 4K Read 5 6.93
0.34 4K Write 1.48 2
0.3 4K Mixed 1.16 1.6
108% 2.55 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
223GB free, PID 5591
Operating at USB 3.0 Speed
SusWrite @10s intervals: 56 61 63 59 61 51 MB/s
Read 135
Write 30
Mixed 62.7
SusWrite 58.4
83% 71.5 MB/s
4K Read 4.1
4K Write 1.8
4K Mixed 1.2
117% 2.37 MB/s
229GB free, PID 5591
Operating at USB 3.0 Speed
SusWrite @10s intervals: 62 64 64 46 30 31 MB/s
Read 146
Write 48.3
Mixed 58
SusWrite 49.5
87% 75.4 MB/s
4K Read 3.7
4K Write 1.6
4K Mixed 1.4
116% 2.23 MB/s
225GB free, PID 5591
Operating at USB 3.0 Speed
SusWrite @10s intervals: 57 60 61 32 30 27 MB/s
Read 148
Write 40.8
Mixed 60.9
SusWrite 44.7
83% 73.5 MB/s
4K Read 4
4K Write 1.6
4K Mixed 1.4
117% 2.33 MB/s
32GB free, PID 5591
Operating at USB 3.0 Speed
SusWrite @10s intervals: 63 64 61 37 26 29 MB/s
Read 151
Write 64.5
Mixed 66.1
SusWrite 46.5
96% 82.1 MB/s
4K Read 5.7
4K Write 1
4K Mixed 1.5
106% 2.73 MB/s
225GB free, PID 5591
Operating at USB 2.1 Speed
SusWrite @10s intervals: 12 12 16 15 18 17 MB/s
Read 28.3
Write 20.5
Mixed 16.3
SusWrite 15
26% 20 MB/s
4K Read 3.1
4K Write 1.2
4K Mixed 1
86% 1.77 MB/s
203GB free, PID 5591
Operating at USB 2.1 Speed
SusWrite @10s intervals: 7 9 9.5 9.3 8.4 8.4 MB/s
Read 25.2
Write 11.7
Mixed 17.7
SusWrite 8.6
19% 15.8 MB/s
4K Read 4.1
4K Write 1.6
4K Mixed 1.3
114% 2.33 MB/s
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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) July 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]

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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.

 Comments

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.
CPUGPUSSD
Intel Core i5-9600K $195Nvidia GTX 1660S (Super) $230Crucial MX500 250GB $49
Intel Core i5-9400F $158Nvidia GTX 1650S (Super) $160Samsung 850 Evo 120GB $78
Intel Core i7-9700K $355Nvidia RTX 2070S (Super) $510Samsung 860 Evo 250GB $55
HDDRAMUSB
Seagate Barracuda 1TB (2016) $47Corsair Vengeance LPX DDR4 3200 C16 2x8GB $67SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $70SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $681SanDisk Extreme 16GB $24
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