We understand microwave electro-magnetic radiation has frequencies and wavelengths between 1mm and 1m, and frequencies between 300GHz (1mm wave length) and 300MHz (1m).
Curious, I've never considered the 70cm band (432MHz) to be microwave.
Toshiba, like Western Digital, is going to use Microwave-Assisted Magnetic Recording (MAMR) to escape the inability of current PMR tech to go beyond 15-16TB disk drive capacity. Western Dig's MAMR is so phat, it'll store 100TB on a hard drive by 2032 READ MORE Up to now we haven't known what Toshiba planned to do to increase …
but is 16TB of data much more than an educational exercise for HD manufacturers. Mechanical drives have their place, but at this point I believe that they should start going for diversification, or put some more money in to their R&D labs, specifically telling them they are not to try to make a better mechanical drive, just denser storage.