Hi there again - just to put my twopenneth in - I am currently doing the Card Challenge No 2 each month and would be happy to add something like below when I post each months challenge :

A) Make sure that your pictures are a smaller size - (Tell me which size you would prefer)
Back up your contributions yourselves as these challenges will only be held on UKS for - - - - (say 6 months or something?????)

If folk really want to save a particular picture then they should perhaps do so on their own equipment? I have a specific folder called Card Ideas and I store those things in there IYKWIM.