Can Magneto Erase Hard Drives?

Can Magneto Erase Hard Drives? 

Let's first take a look at how hard disk drives (HDDs) and solid state drives (SSDs) works differently.

HDD stores date on its magnetic platter surface, which is divided into billions of tiny magnetic domains. Each domain can be independently magnetized (1) or demagnetized (0). With binary system, we can store all kinds of data on the HDD. 

For magnetic storage like hard disk drives, VHS tapes, or cassettes, Magneto can use his basic power to control magnetism, changing the magnetic domains into random patterns, rendering the data stored within those domains unreadable. This process is called degaussing.

But SSDs (Solid State Drives) are not magnetic storage, they cannot be degaussed. What will Magneto do?

SSD uses flash memories or DRAMs to store ones and zeros. Most SSD manufacturers choose NAND flash memory over DRAM because NAND is non-volatile, which means data will still be stored in NAND even the power is cut off. 
Flash memory works by charging or removing electrons in floating gate transistor cells to represent 0 and 1.

If the floating gate is not charged(neutral), a positive charge in the control gate creates a channel in the p-substrate that carries a current from source to drain. If the floating gate is negatively charged, then this charge blocks the current between source and drain. By sensing the current flow, the computer will read 1; otherwise, it will read 0. The floating gate is completely surrounded by an isolation layer. This enables the floating gate transistor to be used as non-volatile memory, but also imposes the need to find ways to charge or discharge it. 

When we say “erase” an SSD, we actually mean “resetting” it. We reset the electrons to remove the charge from the floating gates, resetting the flash memory contents to 1. By varying the magnetic fields (according to Faraday's law of induction), Magneto can create electricity flushing the electrons, thereby resetting the SSDs.