SSD Tester publishes SSD performance benchmarks, speed tests and reviews.
The Great MicroSD Card Survey
The Great MicroSD Card Survey tests microSD card capacity, performance and reliability, with published methods and data.
About The Great MicroSD Card Survey
The Great MicroSD Card Survey buys name-brand and off-brand microSD cards and tests actual capacity, read and write performance against speed markings, and how much data can be written before failure. It publishes per-card details, a raw data table, current picks, and background on its methods.
Testing began in July 2023 and is ongoing, with some cards still being tested and others still unopened. The project states it is self-funded and not sponsored.
Key features
- Tests whether card capacity matches advertised size to detect fake flash
- Compares read and write performance against printed speed class markings
- Measures total data written before card becomes unreliable or fails
- Publishes raw results table for tested cards
- Lists current picks based on test results
- Explains fake flash and skimpy flash definitions and background
Best for: People choosing microSD cards for phones, cameras, or single-board computers who want independent capacity and endurance data.
Good for
- Self-funded testing with stated no sponsors
- Publishes methods, background, and raw data table
- Includes name-brand and off-brand cards including fake flash
Watch out for
- Many cards are still undergoing testing or waiting to be tested
- No method yet to detect capacity larger than advertised
The Great MicroSD Card Survey at a glance
- Category
- Lifestyle & Hobbies › Shopping & Deals
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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The Great MicroSD Card Survey FAQ
What does the survey mean by fake flash?
SD media whose physical capacity is less than what is advertised to the host via its CSD register.
What does the survey mean by skimpy flash?
Flash media whose capacity as advertised via its CSD register is less than what is printed on the card or packaging.
What criteria are tested for each card?
Authenticity of advertised size, read and write performance compared to speed markings, and endurance measured by data written before unreliability or failure.
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