Average Bench: 23.3% (164th of 622)

Based on 3,111 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 76.7% 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 Write Speed 1.87MB/s
Avg. 4K Random Mixed IO Speed 1.19MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the SanDisk Ultra USB 3.0 16GB is 34.2%. 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 21.8MB/s
Avg. Sequential Mixed IO Speed 29.2MB/s

Average Bench

(Based on 3,111 samples)
Min Avg Max
28.4 Read 79.4 135
7.98 Write 21.8 77
11.7 Mixed 29.2 94.5
44.9% 43.5 MB/s
Min Avg Max
3.48 4K Read 5.19 6.75
0.26 4K Write 1.87 2.81
0.04 4K Mixed 1.19 1.7
124% 2.75 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 136
Write 87.2
Mixed 97.1
129% 107 MB/s
4K Read 5.36
4K Write 1.35
4K Mixed 1.68
123% 2.8 MB/s
14GB free, PID 5581
Operating at USB 2.1 Speed
Read 36.1
Write 8.85
Mixed 13
20% 19.3 MB/s
4K Read 5.16
4K Write 2.75
4K Mixed 1.53
165% 3.15 MB/s
14GB free, PID 5581
Operating at USB 2.1 Speed
Read 36.8
Write 9.45
Mixed 15.5
21% 20.6 MB/s
4K Read 5.09
4K Write 1.89
4K Mixed 1.52
135% 2.84 MB/s
11GB free, PID 5581
Operating at USB 2.1 Speed
Read 28.1
Write 6.13
Mixed 8.51
14% 14.2 MB/s
4K Read 3.7
4K Write 2.43
4K Mixed 1.28
140% 2.47 MB/s
3,111 MORE »


NeweggUS $8.9811 hrs ago.
AmazonUS $9.9415 mins ago.
BHPhotoUS $13.458 hrs ago.
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Typical Ultra USB 3.0 16GB Builds (Compare 9,125 builds) See popular component choices, score breakdowns and rankings.
Gaming 40%
Speed boat
Desktop 54%
Workstation 43%
Speed boat

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

EDIT WITH CUSTOM PC BUILDER Value: 68% - Good Total price: $637

Popular Ultra USB 3.0 16GB compatible motherboards:

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USB Flash Drive Rankings (Price vs Performance) October 2017 USB Rankings.

We highlight the best USB flash drive in terms of balanced performance and value for money using price, 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 price and capacity to yield value for money. Finally thousands of individual user ratings are used to validate our benchmark figures. Vote to share your opinion. [USBFlashPro]


Move Files Quickly with Faster Transfer Speeds...

Added 3 years ago.

Good (edit your comment) Add link

24 days 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


4 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?


5 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


8 months ago.

USB 2.0 not compatible ...


2 months ago.


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


4 months ago.

Fast flashdrive like no other else!


5 months ago.

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

Below average

4 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.


10 months ago.

Not tested yet!

Very poor

3 years ago.

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622 Drives (Compared) Thousands of user benchmarks compiled into one comparison list.

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