The hard disk uses ferromagnetic materials, and the U disk uses ferroelectric materials
The use of hard materials, used to be mainly aluminum, is now the glass, but the real work is not the main material, but the coating on the substrate, which is ferromagnetic.
In addition, now there are many U disk using micro hard disk technology, the core is the same as the hard disk
U disk is the use of semiconductor technology, namely silicon raw materials, in simple terms, the main memory U disk is a chip with CPU core is also something similar. Of course, it should be more inclined to like memory chips, but U disk chip information in power will not disappear.
