Average Bench: 24.9% (153rd of 639)

Based on 10,301 user benchmarks.  Device: VID 0781 PID 5581 Models: SanDisk SanDisk Ultra, SanDisk Ultra

Having just done a review of the 16GB Sandisk Ultra which wasn't a great performer but still managed to represent reasonable value for money, I was expecting much the same from the 32GB Ultra. Generally speaking moving from the 16 to 32 GB capacity results in a doubling of the write speed. This was not the case for 32GB Ultra which had a performance profile that was almost identical to its 16GB sibling. As a consequence the 32GB Ultra is amongst the bottom 5% of 32GB Flash Drives in terms of performance and only slightly better in terms of value for money. There is no doubt that it's worth spending a little more on the superb 32GB Sandisk Extreme[Feb '14 USBFlashPro]

Poor: 11%Average: 24.9% Great: 38%

Very poor average bench

The SanDisk Ultra USB 3.0 32GB averaged 75.0% 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 Random Mixed IO Speed 2.17MB/s
Avg. 4K Random Write Speed 1.77MB/s

Good consistency

The range of scores (95th - 5th percentile) for the SanDisk Ultra USB 3.0 32GB is 26.9%. This is a relatively narrow range which indicates that the SanDisk Ultra USB 3.0 32GB performs reasonably consistently under varying real world conditions.


Avg. Sustained Write Speed 23.6MB/s
Avg. Sequential Write Speed 32.3MB/s

Average Bench

(Based on 10,301 samples)
Min Avg Max
27.8 Read 90.5 152
11.4 Write 32.3 57.5
12.5 Mixed 40.9 76.6
9.15 SusWrite 23.6 46
53.8% 46.8 MB/s
Min Avg Max
3.3 4K Read 5.28 7.2
0.5 4K Write 1.77 2.6
0.9 4K Mixed 2.17 3.5
154% 3.07 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
29GB free, PID 5581
Operating at USB 3.0 Speed
SusWrite @10s intervals: 48 48 48 48 47 47 MB/s
Read 141
Write 46.8
Mixed 72.5
SusWrite 47.7
90% 76.9 MB/s
4K Read 4.7
4K Write 1.9
4K Mixed 2.6
170% 3.07 MB/s
17GB free, PID 5581
Operating at USB 3.0 Speed
SusWrite @10s intervals: 37 41 34 13 13 15 MB/s
Read 159
Write 24.5
Mixed 57.3
SusWrite 25.8
69% 66.6 MB/s
4K Read 7.2
4K Write 2.3
4K Mixed 2
173% 3.83 MB/s
27GB free, PID 5581
Operating at USB 3.0 Speed
SusWrite @10s intervals: 39 41 32 13 13 12 MB/s
Read 128
Write 40.7
Mixed 55.2
SusWrite 24.9
70% 62.2 MB/s
4K Read 6.5
4K Write 1.9
4K Mixed 1.9
153% 3.43 MB/s
25GB free, PID 5581
Operating at USB 3.0 Speed
SusWrite @10s intervals: 39 42 40 10 7.7 7.8 MB/s
Read 122
Write 38
Mixed 61.4
SusWrite 24.5
70% 61.6 MB/s
4K Read 5.6
4K Write 1.6
4K Mixed 2.8
170% 3.33 MB/s
22GB free, PID 5581
Operating at USB 2.1 Speed
SusWrite @10s intervals: 14 14 14 14 14 14 MB/s
Read 27
Write 11.5
Mixed 17.5
SusWrite 14.1
22% 17.5 MB/s
4K Read 4.6
4K Write 2.1
4K Mixed 2.7
180% 3.13 MB/s
10,301 MORE »


Approx. $26 @ launch in Jul '13
AmazonUS $112 mins
BHPhotoUS $136 hrs
NeweggUS $422 days
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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) November 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.


Stylish, Portable Design...

Added 4 years ago.


14 months ago.


The read and write speed is abolutly not was got promised by sundisk. Max. write speed on USB 3.0 port is 30Mb/sec.—Oct '14


2 years ago.

My results were Read140MB/s, write:72MB/S on usb 3.0, which is great! Don't know how others got such low results, maybe on usb 2.0. Great product!

Very poor

4 years ago.

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

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The Best.
Intel Core i7-8700K $359Nvidia GTX 1070 $340Samsung 850 Evo 250GB $80
AMD Ryzen 5 1600 $130Nvidia GTX 1060-6GB $234Samsung 850 Evo 500GB $100
Intel Core i5-8600K $237AMD RX 480 $280Samsung 850 Pro 256GB $163
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $130SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $130SanDisk Ultra Fit 32GB $12
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