What do the abbreviations A1 and A2 mean on SD cards?
Are high-speed/high-capacity (A1, A2, U3) microSD cards worth it for Android? With Black Friday and Cyber Monday deals coming up, I (re)tested 5 of those and 2 older ones in 3 quite
Which Micro SD Card? Sandisk Ultra (A1 U1) vs Amazon Basics (A2 U3) vs Integral (A1 U3)? : r/SteamDeck
マイクロSDカード 512GB microSDXCカード SanDisk 【保証一年】サンディスク microsdカード UHS-I FULL HD アプリ最適化 Rated A1対応 Niの通販はau PAY マーケット - リコメン堂
Products compatible with A1 standard of microSD card perform twice as much as the minimum standard and may exceed products compatible with A2 standard - GIGAZINE