As of 2007 almost 94% of the data stored worldwide was held digitally: 52% on hard disks, 28% on optical devices and 11% on digital magnetic tape.
截至2007年，全球存儲的數據中有近94％採用數字方式進行：硬盤为52％，光學設備为28％，數碼磁帶为11％。