What is an SD card primarily used for?

An SD card is primarily used for data storage, making it a compact and convenient medium to save and retrieve various types of data. This includes everything from photos and videos captured on cameras and smartphones, to music files and documents stored on computers or other digital devices. The SD card's design allows it to easily fit into multiple devices, providing portable and removable storage solutions that are widely used in consumer electronics.

Focusing on the other options, data processing involves manipulating and analyzing data, which is not a function performed by an SD card. Data transmission refers to sending data from one device to another, which requires separate hardware or interfaces, not the card itself. Data visualization pertains to the graphical representation of information and data, a process that typically occurs through software applications that analyze data rather than through storage devices like SD cards. Thus, the function of an SD card aligns specifically with data storage.