Once upon a time, the best way for you to back up the entirety of your computer's data was to use the medium that was once the best way to listen to music: magnetic tape. Writeable optical media, cheap hard drives, and cloud storage eventually became the consumer norm, but tape drives still hung around as one of the best options for mass data backup. Sony has developed a new technology that pushes tape drives far beyond where they once were, leading to individual tapes with 185TB of storage capacity.