SD card is a kind of format for mass data
storage. This tiny device is non-volatile, and no power is needed to maintain
the information stored in the chip. We can find it almost everywhere, such as
in digital cameras, personal digital assistants, digital audio players, cell
phones, MP3 players and other solid-state drives. Apart from general storage,
it can furthermore transfer data between computer and other digital devices.
Most people just know above these about SD card. Technically speaking, SD card
offers faster read speed and better kinetic shock resistance than hard disks.
SD card is a specific type of electrically-erasable programmable read-only
memory, which means users can delete files or program in large blocks.
