So I have iCloud set up on my PC. I see all my "my photostream" photos and shared stream photos on my PC in the iCloud created directory/folders. Do I need to do anything else to preserve those photos forever on my hard drive (other than normal PC backup routines)? In other words, if I turn off "my photostream" or delete the shared streams on my iOS devices, are the photos than deleted from my PC too? Do I need to manually copy all of the folders/photos that iCloud copied onto my PC to another directory (outside iCloud), so that the photos are saved permanently on my hard drive?