Average Bench: 28.8% (99th of 639)

Based on 8,135 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]


Very poor average bench

The SanDisk Ultra USB 3.0 32GB averaged 71.1% 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.


Avg. 4K Random Write Speed 1.99MB/s
Avg. 4K Random Mixed IO Speed 1MB/s

Good consistency

The range of scores (95th - 5th percentile) for the SanDisk Ultra USB 3.0 32GB is 29.8%. 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. Sequential Write Speed 34.9MB/s
Avg. Sequential Read Speed 94.8MB/s

Average Bench

(Based on 8,135 samples)
Min Avg Max
28 Read 94.8 156
12.3 Write 34.9 71.3
15.8 Mixed 47.7 90.4
65.2% 59.2 MB/s
Min Avg Max
3.51 4K Read 5.62 7.39
0.58 4K Write 1.99 2.64
0.45 4K Mixed 1 1.48
122% 2.87 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
22GB free, PID 5581
Operating at USB 3.0 Speed
Read 135
Write 58.1
Mixed 80.6
104% 91.2 MB/s
4K Read 6.07
4K Write 2.51
4K Mixed 1.29
152% 3.29 MB/s
24GB free, PID 5581
Operating at USB 3.0 Speed
Read 134
Write 56.9
Mixed 77.2
101% 89.3 MB/s
4K Read 5.94
4K Write 2.39
4K Mixed 0.41
117% 2.91 MB/s
29GB free, PID 5581
Operating at USB 2.1 Speed
Read 38.1
Write 21.5
Mixed 27.6
35% 29.1 MB/s
4K Read 6.47
4K Write 2.45
4K Mixed 1.4
155% 3.44 MB/s
24GB free, PID 5581
Operating at USB 2.1 Speed
Read 38.8
Write 21.2
Mixed 26.6
34% 28.9 MB/s
4K Read 5.19
4K Write 2.51
4K Mixed 1.35
150% 3.02 MB/s
20GB free, PID 5581
Operating at USB 2.1 Speed
Read 27.9
Write 13.3
Mixed 14.6
21% 18.6 MB/s
4K Read 3.78
4K Write 0.48
4K Mixed 0.02
31% 1.42 MB/s
8,135 MORE »


Approx. $26 @ launch in Jul '13
AmazonUS $1212 mins
BHPhotoUS $143 hrs
NeweggUS $428 hrs
Send price feedback
Typical Ultra USB 3.0 32GB Builds (Compare 19,531 builds) See popular component choices, score breakdowns and rankings.
Gaming 94%
Nuclear submarine
Desktop 85%
Aircraft carrier
Workstation 65%
Battle cruiser

Motherboard: Asus Z170 PRO GAMING - $157

EDIT WITH CUSTOM PC BUILDER Value: 85% - Excellent Total price: $1,226

Popular Ultra USB 3.0 32GB compatible motherboards:

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.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.
USB Flash Drive Rankings (Price vs Performance) April 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.
  • Fastest real world speed - Real World Speed measures performance for typical flash usage patterns.
  • Best value for money - Value for money is based on real world performance, price and capacity.
  • Raw speed comparison - Raw speed readings.


Stylish, Portable Design...

Added 4 years ago.


7 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


19 months 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

 Best User Rated

The Best.
Intel Core i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $80
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $300Samsung 850 Evo 500GB $137
AMD Ryzen 5 1600 $170AMD RX 480 $350Samsung 850 Pro 256GB $163
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $183SanDisk Extreme 64GB $70
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $957SanDisk Extreme 32GB $45
Seagate Barracuda 2TB (2016) $36Corsair Vengeance LPX DDR4 3200 C16 2x8GB $195SanDisk Ultra Fit 32GB $12
Today's hottest deals
User Guide  •  About  •  FAQs  •  Email  •  Privacy  •  Developer Feedback