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YOUR USB
SanDiskSDCZ800-128G
Group Average(9 Highest-Voted)
▲ 502 ▼

Release date ≈ Q1 2017.

VS
Effective Speed 
+3%
Real World Speed
Performance profile from 967 user samples
Benchmark your USB here
967 User Benchmarks
Best Bench: 66% 36GB free, PID 558b @USB 3.0
Worst Bench: 12% 111GB free, PID 558b @USB 2.1
Poor: 12% Great: 66%
SPEED RANK: 36th / 639
Effective Speed
Effective USB Speed 		43 % +3% 41.6 %
Peak Score 
+33%
Read
Peak Sequential Read Speed 		195 MB/s Slightly faster peak read speed.
+9% 		179 MB/s
Write
Peak Sequential Write Speed 		143 MB/s Much faster peak write speed.
+43% 		100 MB/s
4K Read
Peak 4K Random Read Speed 		5.74 MB/s 10.7 MB/s Hugely faster peak random read.
+86%
4K Write
Peak 4K Random Write Speed 		2.4 MB/s 4.7 MB/s Hugely faster peak random write.
+96%
Value & Sentiment 
+16%
User Rating
UBM User Rating 		50 % 54.9 % Slightly more popular.
+10%
Price
Price (score) 		$36 22.3 USD Much cheaper.
+61%
Value
Value For Money 		62.2 % Hugely better value.
+120% 		28.3 %
Nice To Haves 
+52%
Age
Newest 		91+ Months Much more recent.
+52% 		139 Months
Specifications 
Capacity
Capacity 		127GB   —
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USB Flash Drive Rankings (Price vs Performance) November 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]

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.

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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
Why does UserBenchmark have a bad reputation on reddit?
Marketers operate thousands of reddit accounts. Our benchmarks expose their spiel so they attack our reputation.
Why don’t PC brands endorse UserBenchmark?
Brands make boatloads on flagships like the 4090 and 14900KS. We help users get similar real-world performance for less money.
Why don’t youtubers promote UserBenchmark?
We don't pay youtubers, so they don't praise us. Moreover, our data obstructs youtubers who promote overpriced or inferior products.
Why does UserBenchmark have negative trustpilot reviews?
The 200+ trustpilot reviews are mostly written by virgin marketing accounts. Real users don't give a monkey's about big brands.
Why is UserBenchmark the gold standard for users?
Instead of pursuing brands for sponsorship, we've spent 13 years publishing real-world data for users.
The Best
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Intel Core i5-12600K $164Nvidia RTX 4060-Ti $389WD Black SN850X M.2 1TB $80
Intel Core i5-13600K $210Nvidia RTX 4070 $500Crucial T700 M.2 4TB $389
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