On 12/22/2012 09:53 AM, COURYHOUSE at 
aol.com wrote:
  what  about using SD cards?   someone  told   me  the
innards  were
 better than the ones they use in USB  drives and other  have told me there is not
 much difference? 
You can get SLC SD cards; they're not cheap (just like the SLC USB flash
drives).  I've heard, but cannot confirm, that the SD cards don't have
the same quality of firmware used for wear-leveling that USB pen drives do.
I have no idea how true this is.
--Chuck