A new type of magnetic tape material can store 74 times more data per unit than today's devices

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The material has been developed by Sony and can store an impressive 148 gigabits per square inch.
This is the world's highest recording density magnetic tape ever made, and could lead to tape cartridges with a storage capacity of 185 TB.
By comparison, the latest generation of magnetic tape storage devices, used mostly by data centres and corporate archives, can only store around 2.5 TB per cartridge. Unimpressive.
To make the new material, Sony used technology called sputter deposition, which involves shooting argon ions at a polymer film substrate. This produced layers of magnetic crystal particles with an average size of 7.7 nanometers.

Source: IT World