SD (Secure Digital) cards are a form of flash memory storage that are frequently used in digital cameras, smartphones, tablets, and other digital devices.
The terms A1 and A2 refer to the application performance class of SD cards, which is a rating system that measures the card’s speed and performance when operating mobile applications.
A1 and A2 SD cards have varying requirements and specifications:
A1 SD card: This class of SD card is compatible with mobile applications. A1 memory devices have a random read speed of at least 1500 IOPS and a random write speed of at least 500 IOPS.
A2 SD card: The A2 card is an enhanced version of the A1 card with increased performance specifications. A2 SD cards have minimum random read and write speeds of 4000 and 2000 IOPS, respectively.
In conclusion, if you intend to use your SD card to operate mobile applications, an A1 or A2 card may be a suitable option, with A2 cards offering superior performance. To store photos, videos, and documents, however, any class of SD card should suffice.