Average Bench: 25.2% (156th of 639)

Based on 29,874 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 2.05MB/s
Avg. 4K Random Write Speed 1.71MB/s

Good consistency

The range of scores (95th - 5th percentile) for the SanDisk Ultra USB 3.0 32GB is 26.4%. 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 22.3MB/s
Avg. Sequential Write Speed 32MB/s

Average Bench

(Based on 29,874 samples)
Min Avg Max
27.5 Read 95.4 155
10.8 Write 32 57.5
11.8 Mixed 40.6 76.9
7.5 SusWrite 22.3 45.5
53.9% 47.6 MB/s
Min Avg Max
3.29 4K Read 5.43 7.1
0.5 4K Write 1.71 2.7
0.8 4K Mixed 2.05 3.6
148% 3.06 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
24GB free, PID 5581
Operating at USB 3.0 Speed
SusWrite @10s intervals: 51 51 52 53 53 53 MB/s
Read 147
Write 51.3
Mixed 78.7
SusWrite 52.1
98% 82.3 MB/s
4K Read 6.2
4K Write 2.2
4K Mixed 3.3
210% 3.9 MB/s
24GB free, PID 5581
Operating at USB 3.0 Speed
SusWrite @10s intervals: 40 40 31 13 13 13 MB/s
Read 152
Write 37.7
Mixed 58.1
SusWrite 25.1
74% 68.2 MB/s
4K Read 7.1
4K Write 2.3
4K Mixed 1.8
166% 3.73 MB/s
21GB free, PID 5581
Operating at USB 3.0 Speed
SusWrite @10s intervals: 29 37 37 19 13 13 MB/s
Read 117
Write 39.7
Mixed 58
SusWrite 24.7
69% 60 MB/s
4K Read 6.6
4K Write 1.2
4K Mixed 1.3
110% 3.03 MB/s
2GB free, PID 5581
Operating at USB 2.1 Speed
SusWrite @10s intervals: 16 11 17 12 16 12 MB/s
Read 31.5
Write 16.2
Mixed 16.8
SusWrite 13.9
24% 19.6 MB/s
4K Read 3.6
4K Write 1.2
4K Mixed 2.1
126% 2.3 MB/s
29,874 MORE »


MSRP ≈ $26 @ launch in Jul '13
AmazonUS $95 mins
BHPhotoUS $249 months
Send price feedback
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USB Flash Drive Rankings (Price vs Performance) May 2021 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 7 years ago.

Terrible (edit your comment) Add link

2 years 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

7 years ago.


14 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

 Best User Rated

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Intel Core i5-10600K $210Nvidia RTX 3080 $700Samsung 860 Evo 250GB $40
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WD Blue 1TB (2012) $30Corsair Vengeance LPX DDR4 3000 C15 2x8GB $102SanDisk Extreme 32GB $28
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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