I also have a pro account, but I really only use it for CT lo's as a jumping off point to put the lo's on Facebook. I use Carbonite for my main photo and digi stash backup on my PC, and Time Machine for my Mac. You can set a privacy setting on Flickr if you use it for photo storage, but ITA wih the prior poster that it's not the most intuitive setting and you have to really work at it to be sure it's set to private.