[ GLOSSARY DEFINITION ]
Storage
A1 speed
An SD card performance class guaranteeing minimum random read and write for apps.
Also known as:
A1 rating
Full Definition & Technical Explanation
A1 speed is an SD Association class that guarantees minimum random I/O rates suitable for running apps from a card. It is slower than A2.
See A2 speed.
Where A1 speed Matters
Laptops
Frequently Asked Questions
What is A1 speed?
An SD card performance class guaranteeing minimum random read and write for apps.