Cloud issues.

I think you know this person as they rain on the cloud. -> http://news.cnet.com/8301-17852_3-57486930-71/woz-the-cloud-is-a-nightmare/

You've likely read what InstaGram tried to pull just a few weeks ago. -> http://news.cnet.com/8301-1023_3-57560758-93/instagram-hit-with-proposed-class-action-lawsuit/ is sadly a typical response.

Here I keep such on my backups and for my photo collection another copy on a memory stick for safety.

These are your files and your choice to see if the cloud will suffice. I wouldn't rely on them today.
Bob