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YOUR USB
AdataAN005P-16G-CGY
SanDiskSDCZ48-016G
VS
Effective Speed 
+49%
Real World Speed
Performance profile from 19,396 user samples
Benchmark your USB here
57 User Benchmarks
Best Bench: 28% 4GB free, PID 105b @USB 3.0
Worst Bench: 10% 10GB free, PID 105b @USB 2.1
Poor: 10% Great: 28%
SPEED RANK: 317th / 639
19,339 User Benchmarks
Best Bench: 35% 14GB free, PID 5581 @USB 3.0
Worst Bench: 10% 10GB free, PID 5581 @USB 2.1
Poor: 10% Great: 35%
SPEED RANK: 186th / 639
Effective Speed
Effective USB Speed 		15.4 % 22.9 % Much faster effective speed.
+49%
Peak Score 
+123%
Read
Peak Sequential Read Speed 		153 MB/s Hugely faster peak read speed.
+103% 		75.5 MB/s
Write
Peak Sequential Write Speed 		24 MB/s Hugely faster peak write speed.
+171% 		8.85 MB/s
4K Read
Peak 4K Random Read Speed 		10.9 MB/s Much faster peak random read.
+31% 		8.35 MB/s
4K Write
Peak 4K Random Write Speed 		0.23 MB/s Hugely faster peak random write.
+188% 		0.08 MB/s
Value & Sentiment 
+2,052%
Value
Value For Money 		0.39 % 24 % Insanely better value.
+6,056%
User Rating
UBM User Rating 		51 % 52 % +2%
Price
Price (score) 		$257 $6 Hugely cheaper.
+98%
Nice To Haves 
+18%
Age
Newest 		164 Months 135 Months More recent.
+18%
Specifications 
Capacity
Capacity 		16GB 16GB
Conclusion 
Average Bench 15.4%
Average Bench 22.9%
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Despite a very strong sequential read speed of 153 MB/s, we are disappointed with this drive. Given its high price point we expect a more symmetrical read/write performance profile. The drive is not alone in this regard, all to often manufacturers focus on headline speeds rather than factors that will impact real world performance. The drive has no indicator light, is priced relatively highly and has below average write speeds. At this time there are far better deals to be had in the market. [Aug '12 USBFlashPro]

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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]

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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 $132Nvidia 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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