Average Bench: 23.7% (165th of 632)

Based on 3,829 user benchmarks.  Device: VID 0781 PID 5581 Models: SanDisk SanDisk Ultra, SanDisk Ultra

Sandisk had phenomenal success with the Sandisk Extreme which I reviewed nearly two years ago. The Extreme is still one of the best flash drives available. I had high hopes for the Ultra despite its marginally more budget orientation. Unfortunately the 16GB Ultra turned out to be a disappointment. With sequential read/write speeds of just 75/9 Mbps the Ultra lies in the bottom 25% of 16GB USB 3.0 flash drives. Small file (4K) read/write speeds clocked in at 8.35/0.08 MBps which is also in the bottom 25%. On the bright side the Ultra USB 3.0 isn't overpriced so it does represents reasonable value for money but I would happily spend a little more and get the record breaking 16GB Sandisk Extreme [Feb '14 USBFlashPro]


Very poor average bench

The SanDisk Ultra USB 3.0 16GB averaged 76.2% 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 Random Write Speed 1.86MB/s
Avg. 4K Random Mixed IO Speed 1.18MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the SanDisk Ultra USB 3.0 16GB is 34%. This is a relatively narrow range which indicates that the SanDisk Ultra USB 3.0 16GB performs reasonably consistently under varying real world conditions.


Avg. Sequential Write Speed 21.7MB/s
Avg. Sequential Mixed IO Speed 30MB/s

Average Bench

(Based on 3,829 samples)
Min Avg Max
28.1 Read 83.1 137
7.99 Write 21.7 77.7
11.9 Mixed 30 94.4
46% 44.9 MB/s
Min Avg Max
3.47 4K Read 5.31 7.29
0.18 4K Write 1.86 2.78
0.03 4K Mixed 1.18 1.68
123% 2.78 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
11GB free, PID 5581
Operating at USB 3.0 Speed
Read 135
Write 88.4
Mixed 95.6
128% 106 MB/s
4K Read 6.41
4K Write 0.6
4K Mixed 1.03
79% 2.68 MB/s
14GB free, PID 5581
Operating at USB 3.0 Speed
Read 119
Write 11
Mixed 19
42% 49.8 MB/s
4K Read 6.02
4K Write 2.81
4K Mixed 0.78
144% 3.2 MB/s
11GB free, PID 5581
Operating at USB 3.0 Speed
Read 119
Write 13
Mixed 23
46% 51.7 MB/s
4K Read 6.1
4K Write 2.62
4K Mixed 1.56
165% 3.43 MB/s
15GB free, PID 5581
Operating at USB 3.0 Speed
Read 106
Write 9.99
Mixed 14.2
36% 43.4 MB/s
4K Read 5.77
4K Write 1.41
4K Mixed 1.59
123% 2.92 MB/s
11GB free, PID 5581
Operating at USB 2.1 Speed
Read 32
Write 16
Mixed 17.1
25% 21.7 MB/s
4K Read 3.85
4K Write 0.76
4K Mixed 0.55
59% 1.72 MB/s
3,829 MORE »


Approx. $14 @ launch in Jan '13
AmazonUS $1013 mins
BHPhotoUS $1122 hrs
NeweggUS $3211 hrs
Send price feedback
Typical Ultra USB 3.0 16GB Builds (Compare 13,314 builds) See popular component choices, score breakdowns and rankings.
Gaming 40%
Jet ski
Desktop 54%
Workstation 43%
Speed boat

Motherboard: MSI 970 GAMING (MS-7693) - $102

EDIT WITH CUSTOM PC BUILDER Value: 74% - Very good Total price: $509

Popular Ultra USB 3.0 16GB 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.

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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.
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USB Flash Drive Rankings (Price vs Performance) February 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.


Move Files Quickly with Faster Transfer Speeds...

Added 4 years ago.

Good (edit your comment) Add link

1 month ago.

Poor packaging, dirt and lint gets into socket. No LED i/o light. Zentimo test: Type of file Speed of reading Speed of writing Small files (32.0 KB): 45.57 MB/s 2.81 MB/s Medium files (3.0 MB): 100.48 MB/s 22.48 MB/s Large files (100.0 MB): 104.68 MB/s 20.84 MB/s


8 months ago.

I feel cheated. There's only 58.9 GB showing. Surely in laws relating to Sales Description you should get 64Gb or slightler over. Can you legally advertise something at more than it is?


10 months ago.


Berbat! kendiliğinden yazma korumasına geçti ve çıkmıyor, biçimlendirilemiyor, sadece okunabiliyor. 16 GB'ın sadece 9-10 GB'ını doldurduktan sonra kilit! Daha önce de 2 adet MP3 player'de bu sorunu yaşamıştım, ikisi de çöp oldu bu da çöp oluyor :(—Apr '15


13 months ago.

USB 2.0 not compatible ...


6 months ago.


It reads 30+ and writs 20+ in usb2 I am very happy with the drive. It is real life experience—Sep '14


8 months ago.

Fast flashdrive like no other else!


9 months ago.

Pretty average usb drive got it for 3 € so worth it.

Below average

9 months ago.

Extremely slow write, so so read .. There are far better options out there. I luckily only use it as an image backup for my Windows 10 install. It's too slow for anything else.


2 hrs ago.

Not tested yet!

Very poor

4 years ago.

632 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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