Degaussing—applying a very strong magnet—has been an accepted method for erasing data off of magnetic media like spinning hard drives for decades. But it doesn't work on SSDs. SSDs don't store data magnetically, so applying a strong magnetic field won't do anything.
Will a degaussing wand work on a SSD Why or why not?
Why Degaussing Won't Work For SSDs
A degausser works by generating a powerful magnetic field that alters the magnetic charges that store data on the drive. ... Degaussing a solid state drive will have virtually no effect on the SSD because the data is not stored magnetically.
Does degaussing destroy a hard drive?
Degaussing is the guaranteed form of hard drive erasure, as such; it serves as the standard method of data destruction. Using the right degausser will guarantee that your information is no longer retrievable. Degaussing is simply a demagnetizing process to erase a hard drive or tape.