Average Bench: 25.2% (155th of 639)

Based on 25,176 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: 25.2% Great: 37%

Very poor average bench

The SanDisk Ultra USB 3.0 32GB averaged 74.7% 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 2.1MB/s
Avg. 4K Random Write Speed 1.74MB/s

Good consistency

The range of scores (95th - 5th percentile) for the SanDisk Ultra USB 3.0 32GB is 26.3%. 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 22.9MB/s
Avg. Sequential Write Speed 32.3MB/s

Average Bench

(Based on 25,176 samples)
Min Avg Max
27.7 Read 93.9 153
10.7 Write 32.3 57.8
12.3 Mixed 40.7 76.7
7.5 SusWrite 22.9 47.7
54.1% 47.4 MB/s
Min Avg Max
3.18 4K Read 5.33 7.1
0.5 4K Write 1.74 2.7
0.79 4K Mixed 2.1 3.5
150% 3.06 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
6GB free, PID 5581
Operating at USB 3.0 Speed
SusWrite @10s intervals: 53 36 20 19 19 19 MB/s
Read 135
Write 56.5
Mixed 76.6
SusWrite 27.7
87% 74 MB/s
4K Read 5.5
4K Write 2.8
4K Mixed 3.6
238% 3.97 MB/s
30GB free, PID 5581
SusWrite @10s intervals: 34 37 38 39 39 38 MB/s
Read 138
Write 38.5
Mixed 32.4
SusWrite 37.5
66% 61.5 MB/s
4K Read 4.2
4K Write 1
4K Mixed 2.6
138% 2.6 MB/s
29GB free, PID 5581
Operating at USB 3.0 Speed
SusWrite @10s intervals: 30 39 38 13 12 13 MB/s
Read 146
Write 38
Mixed 51.8
SusWrite 24.1
70% 64.9 MB/s
4K Read 6.3
4K Write 1
4K Mixed 1.6
112% 2.97 MB/s
7GB free, PID 5581
Operating at USB 3.0 Speed
SusWrite @10s intervals: 19 13 26 22 23 26 MB/s
Read 132
Write 37
Mixed 26.8
SusWrite 21.3
56% 54.2 MB/s
4K Read 2.7
4K Write 0.8
4K Mixed 1.8
98% 1.77 MB/s
25,176 MORE »


Approx. $26 @ launch in Jul '13
AmazonUS $93 mins
BHPhotoUS $244 months
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USB Flash Drive Rankings (Price vs Performance) December 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]


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 6 years ago.

Terrible (edit your comment) Add link

24 months ago.

i plug in usb 3.0 port and it gets 30 mb/s speed sucks!!


3 years 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


4 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

6 years ago.


8 months ago.

Died after a week. Went to read only mode. I have to take it back which is huge hassle for me.

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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