Final answer:
Digital photos are most commonly saved in JPG format due to its ability to display a wide range of colors and its efficient compression, which allows for the storage of more images.
Step-by-step explanation:
When you take a photo with a digital camera, most likely it is saved in JPG format. JPEG stands for Joint Photographic Experts Group and is widely used because it can display millions of colors, making it ideal for digital photos. The two main reasons JPEG format is commonly used for digital photos are its ability to display a wide color range and its efficient compression which creates smaller image files without significantly compromising on image quality. This compression is particularly beneficial as it allows for more photos to be stored in less space on your camera's memory card.
Common digital camera memory card formats include SD, MS, xD, and CF, with capacities ranging from MB to GB. The larger the capacity, the more images the card can hold.