Uhh... The nexus 7 and 9? You realize those have SD and MMC cards soldered to the motherboards and work &#x2F;entirely&#x2F; unlike an SSD, right?<p>Also, the OP is right: TRIM works by telling the SSD which blocks that were previously used are now unused, so that the SSD, at a lower level, can eventually erase the larger flash sector. There is literally no way for the SSD to know this intrinsically because SSDs do not expose a filesystem interface.