Average Bench: 23.1% (166th of 615)

Based on 2,168 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 76.9% 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 1.81MB/s
Avg. 4K Random Mixed IO Speed 1.15MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the SanDisk Ultra USB 3.0 16GB is 34.9%. 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 22.8MB/s
Avg. Sequential Mixed IO Speed 30MB/s

Average Bench

(Based on 2,168 samples)
Min Avg Max
28 Read 78.1 135
8 Write 22.8 78.8
11.9 Mixed 30 93.5
45.5% 43.6 MB/s
Min Avg Max
3.47 4K Read 5.2 7.03
0.27 4K Write 1.81 2.79
0.03 4K Mixed 1.15 1.69
120% 2.72 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
5GB free, PID 5581
Operating at USB 3.0 Speed
Read 127
Write 75.6
Mixed 93.3
118% 98.5 MB/s
4K Read 4.23
4K Write 1.98
4K Mixed 1.42
131% 2.54 MB/s
14GB free, PID 5581
Operating at USB 3.0 Speed
Read 129
Write 63.6
Mixed 97.7
115% 96.9 MB/s
4K Read 6.38
4K Write 2.5
4K Mixed 1.63
164% 3.5 MB/s
15GB free, PID 5581
Operating at USB 3.0 Speed
Read 105
Write 14.6
Mixed 18.2
41% 46.1 MB/s
4K Read 7.38
4K Write 0.35
4K Mixed 0.02
40% 2.58 MB/s
14GB free, PID 5581
Operating at USB 2.1 Speed
Read 33
Write 15.5
Mixed 25.5
29% 24.7 MB/s
4K Read 4.38
4K Write 2.12
4K Mixed 1.47
138% 2.66 MB/s
2GB free, PID 5581
Operating at USB 2.1 Speed
Read 33.1
Write 21.2
Mixed 14.7
26% 23 MB/s
4K Read 3.83
4K Write 0.79
4K Mixed 0.58
61% 1.73 MB/s
2,168 MORE »


AmazonUS $9.9912 mins ago.
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Typical Ultra USB 3.0 16GB Builds (Compare 8,300 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) - $87

EDIT WITH CUSTOM PC BUILDER Value: 70% - Very good Total price: $607

Popular Ultra USB 3.0 16GB compatible motherboards:

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USB Flash Drive Rankings (Price vs Performance) April 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

14 hrs 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 days 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?


2 months ago.

USB 2.0 not compatible ...


2 days 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


1 day ago.


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


1 month ago.

Fast flashdrive like no other else!


2 months ago.

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


4 months ago.

Not tested yet!

Very poor

3 years ago.

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615 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.

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