The SD slot located on the back of some Mac Mini models is a Secure Digital memory card reader. The SD memory card standard is the industry removable storage leader: the memory card type is commonly used in the standard, mini and micro form factors in devices like cellular phones, digital cameras and tablets. According to photojournalism website PetaPixel, Apple began producing the Mac Mini with a built-in SD card reader in mid-2010. The built-in reader permits the computer to interface with SD cards without needing a USB adapter. Writer Bio
