At Notable we believe in organization with a purpose. Our organize function isn't set up to shuffle, file and categorize things, it's designed to help you display your posts for maximum impact and effectiveness.
When you're going to move your posts around, try not to think about "storage" or "putting things into folders." Focus on who you need to share the posts with, and why. This should give you the best idea of what sets and workspaces you want your posts to appear in. Remember, all your posts will still show on your main account view: the Organize function just lets you "assign" them to different places for better viewing and sharing.