There are several different types of storage devices that hold digital data, such as memory cards, CD-ROMs and hard drives. Each storage device ranges in size and capabilities, and the smaller units are commonly found in smartphones and cameras, while larger devices are used in computers.
The most common digital storage device is a memory card. A memory card comes available in several sizes and can fit inside smartphones or other multimedia devices. Larger digital storage devices include hard drives and CD-ROMs. Hard drives are most often found in computers and can store up to 10TB of information as of 2015, while CD-ROMs can hold up to 700 MB of information and are generally used to store documents or other types of files.