Data storage medium is a term used to describe the various ways in which digital data can be stored. The most common solutions are DISC, DISK, ROM, CLOUD, and CDROM. DISC is a flat, round storage device that is read by a laser. DISK is a similar device, but it is usually removable and can be used to store large amounts of data. ROM stands for Read-Only Memory and is a type of non-volatile memory that stores data permanently. CLOUD storage is a form of remote storage that allows users to store data on a remote server. Finally, CDROM stands for Compact DISC Read-Only Memory and is an optical DISC that can store large amounts of data.