I am heartbroken with lost pictures from thumb drive but I checked to see if there are any pictures from my TM and found a lot of them but lost some. Also I check to see if Aperture save any pictures but I found out Aperture did not save them only leave it on thumb drive I requested it to save SSD space. I guess I don't trust thumb drive for storing pictures... I have to order 4th external portable drive again. I have three external drives one wireless drive for iTunes library, one for TM, and last one for video editing. I am afraid of storing valuable pictures to external drive in case of messed up.