Average Bench: 70.7% (8th of 638)

Based on 165 user benchmarks.  Device: VID 0781 PID 5588 Model: SanDisk Extreme Pro
Poor: 25%Average: 70.7% Great: 136%

Good average bench

The SanDisk Extreme Pro USB 3.1 128GB averaged 29.2% 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-64Thread Write Speed 11.8MB/s
Avg. 4K Random Write Speed 8.65MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the SanDisk Extreme Pro USB 3.1 128GB is 111%. This is a particularly wide range which indicates that the SanDisk Extreme Pro USB 3.1 128GB performs inconsistently under varying real world conditions.


Avg. 4K Random Read Speed 8.3MB/s
Avg. Sequential Read Speed 141MB/s

Average Bench

(Based on 165 samples)
Min Avg Max
29.1 Read 141 296
17.8 Write 94.3 254
7.24 Mixed 81.9 213
16 SusWrite 107 267
137% 106 MB/s
Min Avg Max
4.4 4K Read 8.3 13.1
1.96 4K Write 8.65 12.4
2.34 4K Mixed 5.65 10.4
517% 7.54 MB/s
Min Avg Max
8.62 DQ Read 12.5 16.2
9.16 DQ Write 11.8 13.3
4.1 DQ Mixed 8.3 13
729% 10.9 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
119GB free, PID 5588
Operating at USB 3.0 Speed
SusWrite @10s intervals: 63 54 61 90 87 68 MB/s
Read 50.2
Write 71.5
Mixed 6.7
SusWrite 70.4
68% 49.7 MB/s
4K Read 13.2
4K Write 8.5
4K Mixed 3.3
450% 8.33 MB/s
DQ Read 13.7
DQ Write 12.8
DQ Mixed 11.7
884% 12.7 MB/s
28GB free, PID 5588
Operating at USB 2.1 Speed
SusWrite @10s intervals: 0.5 0.5 0.5 0.5 0.5 0.5 MB/s
Read 0.8
Write 0.5
Mixed 0.5
SusWrite 0.5
1% 0.57 MB/s
4K Read 0.5
4K Write 0.5
4K Mixed 0.5
36% 0.5 MB/s
165 MORE »


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USB Flash Drive Rankings (Price vs Performance) March 2019 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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  • Best user rated - User sentiment trumps benchmarks for this comparison.
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  • Fastest real world speed - Real World Speed measures performance for typical consumers.


Added n/a ago.

Excellent (edit your comment) Add link

2 months ago.

I get consistent 350MB/s write speeds.


4 months ago.

good performace but lower that expectation, the 420mb/s in paper to a 350 - 300mb/s in a real work maximun speed.

638 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 $380Nvidia GTX 1070 $330Samsung 850 Evo 250GB $104
AMD Ryzen 5 1600 $120Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $105
Intel Core i5-8600K $260Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $88
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3000 C15 2x8GB $105SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $716SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $40Corsair Vengeance LPX DDR4 3200 C16 2x8GB $120SanDisk Ultra Fit 32GB $12
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