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USB
RANKINGS
TEST
YOUR USB
SanDiskSDCZ48-032G
AdataAS102P-64G-RGY
VS
Effective Speed 
+1%
Real World Speed
Performance profile from 34,324 user samples
Benchmark your USB here
33,725 User Benchmarks
Best Bench: 38% 29GB free, PID 5581 @USB 3.0
Worst Bench: 11% 26GB free, PID 5581 @USB 2.1
Poor: 11% Great: 38%
SPEED RANK: 146th / 639
599 User Benchmarks
Best Bench: 51% 56GB free, PID 312b @USB 3.2
Worst Bench: 10% 30GB free, PID 312b @USB 2.1
Poor: 10% Great: 51%
SPEED RANK: 140th / 639
Effective Speed
Effective USB Speed 		26 % 26.3 % +1%
Peak Score 
+1,087%
Read
Peak Sequential Read Speed 		65.9 MB/s 196 MB/s Hugely faster peak read speed.
+198%
Write
Peak Sequential Write Speed 		8.45 MB/s 99.6 MB/s Insanely faster peak write speed.
+1,079%
4K Read
Peak 4K Random Read Speed 		8.38 MB/s 11.3 MB/s Much faster peak random read.
+35%
4K Write
Peak 4K Random Write Speed 		0.08 MB/s 2.51 MB/s Insanely faster peak random write.
+3,038%
Value & Sentiment 
+8%
Value
Value For Money 		45.5 % 53.9 % Better value.
+18%
User Rating
UBM User Rating 		52 % +2% 51 %
Price
Price (score) 		$8 Much cheaper.
+42% 		$13
Nice To Haves 
+19%
Age
Newest 		129 Months More recent.
+19% 		159 Months
Specifications 
Capacity
Capacity 		32GB 64GB
Conclusion 
Average Bench 26%
Average Bench 26.3%
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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]

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The Adata Dashdrive Elite S102 Pro 64GB has proven to be a popular USB 3.0 flash drive. I did a full review of the 16GB version back in 2012 and little has changed since then. The S102 Pro still has the same robust form factor and reasonable performance profile. The 64GB S102 Pro has sequential read/write speeds of 105/50 MBps which is exactly in line with the indicated speeds on Adata's website. Peak small 4K file performance is currently measuring 7.84/1.49 MB/s which is well above average for a 64GB flash drive. At present our users have only submit four benchmark samples for this model, the peak 4K speeds are likely to drop as we accumulate more samples. The 64GB S102 Pro's performace is largely in line with its 32GB sibling and it bests its 16GB sibling by around 30%. Overall the 64GB S102 Pro Dashdrive Elite represents good value for money. [Feb '14 USBFlashPro]

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Custom PC Builder (Start a new build) Build your perfect PC: compare component prices, popularity, speed and value for money

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USB Flash Drive Rankings (Price vs Performance) April 2024 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]

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Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
How Fast Is Your USB? (Bench your build) Size up your PC in less than a minute

Welcome to our 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 value for money upgrades.

UserBenchmark of the month

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How it works

  • - Download and run UserBenchmark
  • - CPU tests include: integer, floating and string
  • - GPU tests include: six 3D game simulations
  • - Drive tests include: read, write, sustained write and mixed IO
  • - RAM tests include: single/multi core bandwidth and latency
  • - SkillBench (space shooter) tests user input accuracy
  • - 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 current market leaders
  • - Explore your best upgrade options with a virtual PC build
  • - Compare your in-game FPS to other users with your hardware

 Frequently Asked Questions

Storage Devices FAQ
What is sustained sequential write speed?
What’s the difference between SLC, MLC and TLC?
What is 3D XPoint and how fast is it?
What’s the difference between SATA, PCIe and NVMe?
What’s the difference between NAND and V-NAND?
What is sequential write speed?
What is sequential read speed?
What is incompressible data?
USB Flash Drives
How do you install an OS from a USB flash drive?
What is the Flash Drive value for money rating?
What is effective USB Flash Drive speed?
Why should USB 2.0 Flash Drives be avoided?
File system considerations?
Do dimensions matter?
What are the main factors to look out for?
16GB USB Flash Drives
Why is bigger better?
ALL FAQs »

 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-13600K $273Nvidia RTX 4060 $300Crucial MX500 250GB $40
Intel Core i5-12400F $131Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $186Nvidia RTX 4070 $409Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $34Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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