Why does my SSD have an FCC logo on it?
Judging by this, in the "FCC Test Procedure" chapter, most likely to ensure that the SSD does not emit any kind of electromagnetic radiation that could harm or be detrimental to the computer's operation.


  Super Talent’s SSDs were tested by an independent testing laboratory for
  Federal Communications Commission (FCC) certification. This is an official
  recognition by the American government for products that meet inbound and
  outbound radiation limits so it will not affect the communication of surrounding
  products.


This question Which products should have FCC certification and about how much does that cost? matters:


  In the US, all products containing electronics that oscillate above 9 kHz must be certified. 


which most certainly is the case for SSDs, judging from this manufacturer of oscillators for SSD applications.