The first storage media — paper tape and punched cards — were inefficient, slow and bulky. These gave way to magnetic storage: core memory, drums and, finally, hard drives. For backup, there were removable media: magnetic tape reels and cartridges, floppy disks and removable hard drives. Then optics (CD-ROM and DVD drives) supplanted magnetism for archival uses. Today's computers need to store more data than ever. The most recent generation of storage replaces moving parts with solid-state electronics.
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