TRIM
(ver 1.3)
Abandoned Freeware


Solid State Drives [SSD], while popular, have a quirk not 
found on conventional hard drives.  When data is erased, 
the sectors are marked unavailable for placing new data, 
and the useful size of the drive decreases. To make them 
available again, a utility called TRIM must be run.  

This is why the manufacturer says not to run "defrag" on 
a SSD drive.  Even fragmented, the data is nearly as fast 
to access as RAM, and you would now be leaving all those 
sectors where the data was moved from unavailable.  Always 
use TRIM on an SSD or CompactFlash [CF] instead.