How about 70% health of SSD?

Pity. Solid-state hard disk is mainly composed of pcb printed circuit board, flash memory particles, disk control chip, resistor/capacitor, interface components, shell and so on. 70% health status indicates that there is something wrong with the hard disk. Don't use it, and return it quickly. 70% of the life of hard disk mainly means that 30% of the life of flash memory particles is reused.