Average Bench: 26.6% (121st of 622)

Based on 2,273 user benchmarks.  Device: VID 0781 PID 5583 Model: SanDisk Ultra Fit

The 64GB SanDisk Ultra Fit is the largest capacity available in the Ultra Fit range. Both the 16GB and 32GB siblings fared well in terms of peak performance but with the majority of flash based products larger capacities are faster. Unfortunately for the Ultra Fit this proved not to be the case. Comparing the performance leading Mushkin Ventura and 64GB Ultra Fit shows that the Ventura is around 600% faster but just 60% more expensive. Although the Ultra Fit is a contender in the 32GB and 16GB capacities it doesn't fare well against the 64GB competition. If you are looking for a tiny form factor the 64GB SanDisk Ultra Fit is superb but otherwise there are better alternatives available with better peak and significantly better sustained transfer speeds. [Oct '14 USBFlashPro]


Very poor average bench

The SanDisk Ultra Fit USB 3.0 64GB averaged 73.4% 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 1.41MB/s
Avg. 4K Random Mixed IO Speed 0.7MB/s

Good consistency

The range of scores (95th - 5th percentile) for the SanDisk Ultra Fit USB 3.0 64GB is 28.5%. This is a relatively narrow range which indicates that the SanDisk Ultra Fit USB 3.0 64GB performs reasonably consistently under varying real world conditions.


Avg. 4K Random Read Speed 4.5MB/s
Avg. Sequential Write Speed 31.9MB/s

Average Bench

(Based on 2,273 samples)
Min Avg Max
27.6 Read 98 143
8.13 Write 31.9 56.4
10.7 Mixed 38.4 63.9
59.2% 56.1 MB/s
Min Avg Max
3 4K Read 4.5 5.66
0.83 4K Write 1.41 1.87
0.55 4K Mixed 0.7 0.81
88.7% 2.21 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
54GB free, PID 5583
Operating at USB 3.0 Speed
Read 140
Write 49.7
Mixed 59.7
89% 83 MB/s
4K Read 4.83
4K Write 1.68
4K Mixed 0.77
101% 2.43 MB/s
55GB free, PID 5583
Operating at USB 2.1 Speed
Read 36.1
Write 9.46
Mixed 16.7
22% 20.8 MB/s
4K Read 4.15
4K Write 0.92
4K Mixed 0.72
71% 1.93 MB/s
39GB free, PID 5583
Operating at USB 2.1 Speed
Read 30.2
Write 7.76
Mixed 10.7
16% 16.2 MB/s
4K Read 3.62
4K Write 0.89
4K Mixed 0.71
68% 1.74 MB/s
39GB free, PID 5583
Operating at USB 2.1 Speed
Read 28.8
Write 7.71
Mixed 10.6
16% 15.7 MB/s
4K Read 3.65
4K Write 0.89
4K Mixed 0.71
68% 1.75 MB/s
2,273 MORE »


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Typical Ultra Fit USB 3.0 64GB Builds (Compare 13,040 builds) See popular component choices, score breakdowns and rankings.
Gaming 95%
Nuclear submarine
Desktop 86%
Aircraft carrier
Workstation 66%
Battle cruiser

Motherboard: Asus Z170 PRO GAMING - $157

EDIT WITH CUSTOM PC BUILDER Value: 84% - Excellent Total price: $1,120

Popular Ultra Fit USB 3.0 64GB 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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  • - Download and run UserBenchMark (UBM).
  • - CPU tests include: integer, floating and string.
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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]


So small you hardly know it’s there...

Added 2 years ago.


6 months ago.

Met max benchmark speeds. Outdoes many larger thumb-drives. Crazy-small form-factor. Excellent value.


2 years ago.

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622 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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Intel Core i7-7700K $300Nvidia GTX 1070 $390Samsung 850 Evo 250GB $96
AMD Ryzen 7 1700 $280AMD RX 480 $491Samsung 850 Pro 256GB $126
Intel Core i5-7600K $220Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $159
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $163SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $842SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $180SanDisk Ultra Fit 32GB $13
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