Joomla! Discussion Forums

Next question: i see that some articles are using images from a subdirectory, e.g.: while most of the images are directly from the 'main' directory .

There is also a confusing structure, see here:

So my questions are:
1. one (1) directory for all images (e.g: images/stories/help_1_5/.......)
2. subdirectories like: images/stories/help_1_5/user/..... or images/stories/help_1_5/articles/..... and task like : images/stories/help_1_5/tasks/Edit.New.Cancel.png

Both have their advantages.