That's right. The cassette tape. It's back. IBM and Fujifilm are actively developing prototype data storage cassettes that can hold up to 35 terabytes apiece and are up to 200 times more efficient than traditional hard drives.
A superconductor is a material that can transmit electricity with perfect efficiency. Semiconductors also transmit electricity, just not as well, but they work at room temperature. Getting these two materials to play with each other was exceedingly difficult, until someone had the idea of trying Scotch tape. Magic, indeed.