![Markings: speed, size and class | Understanding microSD and SD cards: speeds, markings and more | Adafruit Learning System Markings: speed, size and class | Understanding microSD and SD cards: speeds, markings and more | Adafruit Learning System](https://cdn-learn.adafruit.com/assets/assets/000/104/735/medium800/components_Screen_Shot_2021-09-17_at_3.07.46_PM.png?1631905789)
Markings: speed, size and class | Understanding microSD and SD cards: speeds, markings and more | Adafruit Learning System
![Micro SD Cards for Development Boards - Classes, Tools, Benchmarks, Reliability, and Tips & Tricks - CNX Software Micro SD Cards for Development Boards - Classes, Tools, Benchmarks, Reliability, and Tips & Tricks - CNX Software](http://www.cnx-software.com/wp-content/uploads/2017/06/SD-Card-Speed-Class.jpg)
Micro SD Cards for Development Boards - Classes, Tools, Benchmarks, Reliability, and Tips & Tricks - CNX Software
![Amazon.com: Kingston Canvas Select 32GB MicroSDHC Class 10 MicroSD Memory Card UHS-I 80MB/s R Flash Memory Card with Adapter (SDCS/32GB) : Electronics Amazon.com: Kingston Canvas Select 32GB MicroSDHC Class 10 MicroSD Memory Card UHS-I 80MB/s R Flash Memory Card with Adapter (SDCS/32GB) : Electronics](https://m.media-amazon.com/images/I/61kN1dE94lL.jpg)
Amazon.com: Kingston Canvas Select 32GB MicroSDHC Class 10 MicroSD Memory Card UHS-I 80MB/s R Flash Memory Card with Adapter (SDCS/32GB) : Electronics
![PNY 64GB Elite Class 10 U1 microSDHC Flash Memory Card - 100MB/s read, Class 10, U1, Full HD, UHS-I, micro SD - Walmart.com PNY 64GB Elite Class 10 U1 microSDHC Flash Memory Card - 100MB/s read, Class 10, U1, Full HD, UHS-I, micro SD - Walmart.com](https://i5.walmartimages.com/seo/PNY-64GB-Elite-Class-10-U1-microSDHC-Flash-Memory-Card-100MB-s-read-Class-10-U1-Full-HD-UHS-I-micro-SD_b32c563b-3deb-4f6f-8263-d898729dfab7.063926cc0850460447982816f645e623.jpeg)
PNY 64GB Elite Class 10 U1 microSDHC Flash Memory Card - 100MB/s read, Class 10, U1, Full HD, UHS-I, micro SD - Walmart.com
![Amazon.com: Kingston Digital 64 GB microSD Class 10 UHS-1 Memory Card 30MB/s with Adapter (SDCX10/64GB) : Electronics Amazon.com: Kingston Digital 64 GB microSD Class 10 UHS-1 Memory Card 30MB/s with Adapter (SDCX10/64GB) : Electronics](https://m.media-amazon.com/images/I/8142MXZW8ZL._AC_UF894,1000_QL80_.jpg)