Pardon my ignorance, but a solar storm would wipe out offline harddrives/ssds/laptops?
An EMP is a short-duration high voltage spike; i.e. short-wavelength/high-frequency.
A solar storm acts on a large scale and causes a long-duration high voltage spike; i.e. long wavelength/low-frequency.
So an EMP (i.e. a high altitude nuke) will tend to induce high voltage in small "antennas"; i.e. circuits in an SSD or other transistor electronics like your concern.
Whereas a solar storm will induce high voltage in large antennas; think power lines or long cables. However these days there's enough warning and contingencies to mitigate the worst of these effects; i.e. preemptively shut down vulnerable power systems. The grid "crashing" and needing to do a cold start is still very bad, but far better than also getting damaged.
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Edit: I also want to point out that the above is specific to "on the ground" effects as we're shielded by earth's magnetic field. Satellites still get bombarded directly with heavy radiation/particles, which is much closer to an EMP in terms of acute impact.